Moreover, as there exist sigma bonds only and one 2s and three 2p orbitals of the carbon produce four new hybrid orbitals, the hybridization of CH4 is sp3. Determine the following for boron trifluoride. BF3. Use this. #3 Calculate and mark formal charges on the atoms, if required. The fluorine atom has s and p orbital. Bonding structure: 3. 2. (ii) Compare the bonding in diamond and graphite. 806; IUPAC Standard InChI: InChI=1S/BF3/c2-1(3)4 Copy. How to Draw Lewis structure for BF3 Boron Trifluoride?Lewis Structure: lewis structure: NO3- lewis structure: About author. The central atom boron uses all 3 of its valence electrons to share equal bonds with 3 fluorine atoms. BeF 2 , BCl 3, CCl 4, PBr 5, SI 6, BH 2–, NI 3, ClF 4+, SF 5–. #4 Calculate formal charge and check stability (if octet is already completed on central atom) Let’s one by one discuss each step in detail. Calculating the electronegativity difference between the bonded molecules can also help us determine whether a compound is nonpolar or polar. So, total= 21+3= 24. What is the molecular shape of BF3? O Trigonal. 14. Chlorine trifluoride or ClF3 is an extremely reactive chemical compound with several varied applications and unique physical and chemical compounds. Ë--F . Lewis structure of Phosphorus Trifluoride (PF3) The Lewis structure is drawn using eight dots of valence electrons around the symbols of the atom with lines showing bond formation. 2. Study with Quizlet and memorize flashcards containing terms like Which of the following substances will display an incomplete octet in its Lewis structure? Cl2 ICl NO SO2 CO2, Elements that can accommodate more than eight electrons in their valence shell occur in period _____ and above. 2. #3 Mark lone pairs. BF3 is a Lewis acid, like boron tribromide, since it is “electron-deficient” and interacts quickly with Lewis bases to. Lewis structure is one of the oldest methods to illustrate the structure of molecules. In the third step, determine the number of bonds in both atoms. 非易燃. What is the Lewis Structure of BF3? The Lewis structure of BF3helps everyone to understand about the valence electrons that are involved in bonding in a molecule. The electron geometry of PCl 5 is also Trigonal bipyramidal. Bromine trifluoride (BrF3) Lewis dot structure, molecular geometry or shape, electron geometry, bond angle, formal charges, hybridization, polar vs non-polar. An interhalogen compound having both Cl and F, it has a density of around 3. . Thus, the Lewis dot symbols for Br is. lone pair: two (a pair of) valence electrons that are not used to form a covalent bond. Add an electron for every negative (-) charge, and. Explicación paso a paso de como realizar la estructura de Lewis BF3 con gráficos, dibujos y esquemas. 4 BF3 lewis structure has a Boron atom (B) at the center which is surrounded by three Fluorine atoms (F). Cite. Step-2: Lewis Structure of NO2+ for counting valence electrons around the terminal oxygen atoms. For example, in the Lewis structures of beryllium dihydride, BeH 2, and boron trifluoride, BF 3, the beryllium and boron atoms each have only four and six electrons, respectively. Shared pairs of electrons are drawn as lines between atoms, while lone pairs of electrons. for Boron TrifluorideNo. Which is the correct Lewis Structure? inorganic-chemistry. For the NF3 structure use the periodic table to find the total n. 1. . Add an electron for every negative (-) charge, and. Ammonia reacts with boron trifluoride to form a stable compound, as we saw in Section 8. The Lewis structures for the given particles are as follows: A. A step-by-step explanation of how to draw the NH3 Lewis Dot Structure (Ammonia). A simple example of Lewis acid-base complexation involves ammonia and boron trifluoride. A double bond would place 7 around the nitrogen, and a triple bond would place 9 around the nitrogen. 2k BF3 molecule Lewis structure. It is corrosive in nature. Draw a Lewis structure for each of the following: 4. Draw the Lewis structure of the 1:1 adduct that forms in the Lewis acid-base reaction between boron trifluoride (BF3) and dimethyl ether (CH3)20). • Include all valence lone pairs in. In the BF 3 Lewis dot structure, a total of 9 lone pairs and 3 bond pairs are present. lines; lines lines; dots dots; lines, Resonance structures are Lewis structures that have the. A Lewis structure for BF3. Question: Put the following molecules in order of decreasing F-X-F bond angle, where X is the central atom. Now, boron is less electronegative, which makes it the central atom. Let’s discuss each step in more detail. The ideal electron geometry of NO 2– is trigonal planar. Use these steps to correctly draw the BF 3 Lewis structure: #1 First draw a rough sketch. IF3 can be prepared using two methods:-. Step #1: Draw the lewis structure Here is a skeleton of ClF3 lewis structure and it contains three Cl-F bonds. 14. #3 Mark lone pairs. 12. Patterns of problems. This is composed of a σ framework and a π-bond. Atoms of boron follow a sextet rule. Lewis Structure of NO2. NF3 is polar in nature. We can see that the three F atoms and the single Br atom all have their formal charge. Worked example: Lewis diagram of formaldehyde (CH₂O) The Lewis diagram of a molecule can be constructed using the following stepwise procedure: (1) Find the number of valence. (ii) Identify the type of hybridization exhibited by sulfur in the SF 3 + cation. 7. Determine the following for boron trifluoride. The first step is to sketch the molecular geometry of the BCl3 molecule, to calculate the lone pairs of the electron in the central boron atom; the second step is to calculate the BCl3 hybridization, and the third step is to give perfect notation for the BCl3 molecular geometry. Lewis structure: diagram showing lone pairs and bonding pairs of electrons in a molecule or an ion. C. The N has two dots on the side without a fluorine atom. The orbital diagram for the valence shell of phosphorous is: Hence, the third period elements occasionally exceed. Boron (B) is present in Group III A (or 13) of the Periodic Table of Elements. Silicon tetrafluoride is a colorless, toxic, corrosive, and non-flammable gas with. Thus, the Lewis dot symbol for N is. The root anion for ClO 4– is the chlorate (ClO 3–) ion. It obeys the octet rule, but HCO 2 – must have a total of 18 electrons, and the structure below has 20. When there are lone pairs, you need to look at the structure and recognize the names and bond angles. formula b. #4 Calculate formal charge and check stability (if octet is already completed on central atom) Let’s one by one discuss each step in detail. For this molecule, It is SP2 because one π (pi) bond is required for the double bond between the Boron and only three σ bonds are formed per Boron atom. If we draw a Lewis structure for O 3 (ozone), we get this:. ∙ 10y ago. 1). 1. The Lewis dot structure has a central carbon that is bonded to 3 oxygens. Boron Trifluoride | BF3 Lewis Structure, Properties & Molar Mass Beer Brewing Process, History & Ingredients Allotrope Definition, Types & Examples Alchemy Definition, History & Goals. The bromine atom has seven valence electrons, and each fluorine has seven valence electrons, so the Lewis electron structure is. 4. 5 2 3 4, Based on formal charge considerations, the electron. . The Lewis structure of BF3 shows that boron is the central atom with three fluorine atoms bonded to it. 5º. 9 g/mol. Add extra electrons (24-24=0) to central atom:Perchlorate [ClO4]- ion Lewis dot structure, molecular geometry or shape, electron geometry, bond angle, hybridization, formal charges, polar vs. When drawing the structure of an ion, be sure to add/subtract electrons to account for the charge. In. The octet rule is a bonding theory used to predict the molecular structure of covalently bonded molecules. >. The geometry is determined by minimizing the repulsions between electron pairs in the bonds between at. Boron trifluoride (BF3) is a non-polar molecule. Exercise 10. Molecular Structure of BF3 (Boron Trifluoride) The BF3 (Boron Trifluoride) molecule has 1 atom of B (Boron, atomic no: 5) and 3 atoms of F (Fluorine, atomic no: 9). If we add this one boron and three fluorine atoms of the BF3 molecule, there are 24 electrons here in the BF3 molecular. The molecule comprises one Bromine at. The hybridization of phosphorous in PCl 5 is sp 3 d. Draw a Lewis structure for BF3, and explain your answer. If you want to know about the lewis structure of BF 3, you first need to check the number of valence electrons in the molecule of BF 3 which comes out to be 24. com Image Lewis Structure of Boron Trifluoride (BF 3) Boron trifluoride contains one boron atom and three fluorine atoms. One last example is boron trifluoride. Estructura de Lewis BF3, Ejercicio: Primero ordenamos simétricamente asegurándonos que el elemento menos electronegativo quede en el centro. 4, which indicates that the bond between Nitrogen (N) and Chlorine (Cl) is nonpolar. . 5. Let us apply the lewis dot rules and try to draw the structure of boron trichloride. The structure below is also incorrect, but for a different reason. Formula: BF 3. Answer choice (D) is the only Lewis structure that shows three single covalent bonds and. The Lewis structure of any given molecule helps to know the arrangement of atoms in the molecule, bond formations and the lone pairs. Now in the above sketch of CH3Cl molecule, put the two electrons (i. Hence, according to lewis acid-base theory, as Boron accepts lone pair of electrons, so it acts as a lewis acid. The highly symmetrical structure of BF 3 allows the bond dipole moments to cancel, resulting in a molecular dipole moment of zero. Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure may be viewed using Java . The reaction between ammonia and boron trifluoride is shown below. BF3 Lewis Structure. Page ID. A three-step approach for drawing the BCl3 molecular can be used. Octet on "outer" element: 4. The goal is to obtain the "best" electron. Boron trifluoride is electron deficient. The Lewis structure for (ce{BF3}) includes several resonance structures. To determine the number of lone pairs and bonding pairs of electrons for BF3 we first need to draw as valid Lewis Structure. a solution contains equal concentrations of iron (ii) ions and iron (iii) ions. It is interesting to realize that irrespective. BF 3 (boron trifluoride) has one boron atom and three fluorine atoms. Resonance structures are used when a single Lewis structure cannot fully. The nitrogen atom contains only 5 valence electrons. Each fluorine has three lone pairs, Bromine has two lone pairs. Bonding structure: 3. The quick answer is, “There are no pi bonds in "BF"_3", but the answer isn't quite that simple. For the BF3 structure use the periodic table to find the total numb. FC calculations indicate that the “+” charge lies on the C atom, so. 9 $egingroup$ Boron wants the standard octet as badly as anyone else, and indeed reaches it, albeit sometimes by unusual means. Boron trifluoride (BF3) is a poisonous, odorless, and colorless gas. Students used to ask “Is CH3F polar or nonpolar?”, “CH3F Lewis Structure”, “CH3F molecular geometry”, “CH3F bond. Each fluorine atom starts with seven valence electrons and uses only one of them to bond. The valency of B (Boron) is 3 and of F (Fluorine) is 7, thus the Lewis structure of BF3 can be drawn as shown in the figure: As shown in Table 6. Solve any question of Chemical Bonding and Molecular Structure with:-. 2. Both structures (2 and 3) must be used to represent the molecule’s structure. Boron trifluoride (left( ce{BF_3} ight)) consists of a central boron atom with three single bonds to fluorine atoms. Check me out: Lewis Structure. The electron geometry of BH 3 is also Trigonal planar as its central atom has 3 regions of electron density. The Lewis dot structure of nitrogen trifluoride is usually written with a central N for nitrogen, with three Fs for fluorine on three sides. The oxygen atom contains only 6 valence electrons. As there is no hydrogen ion involved in this reaction, it qualifies as an acid-base reaction only under the Lewis definition. Chemistry. Substrate structure controls substitution mechanism S N 1 or S N 2; Stability and structure of carbocations;. F2 + I2 ——> IF3 at −45 °C in CCl3F. The bond angle in BF 3 is 120º. Lewis Structure Rules. Add octets to outer atoms: 4. ChemSpider ID 6116. 3Cl = 7*3=21. In BF3 molecule, boron is having valence electron of three and three fluorine atom has seven valence electron. After. Hyb of BF3= 3+0 =3. Add octets to outer atoms: 4. Formula: BF 3; Molecular weight: 67. The molecular geometry or shape of NO 2– is bent or V-shaped. The Lewis structure of BF3 reveals the arrangement of atoms and the distribution of valence electrons, providing. Balance BF3 + F = BF4 Using Inspection. i. IF3 can be prepared using two methods:-. Understanding the molecular structure of a compound can help determine the polarity, reactivity, phase of matter, color, magnetism, as well as the biological activity. Learn to determine if BF3 is polar or nonpolar based on the Lewis Structure and the molecular geometry (shape). Boron atom is the center atom. Boron is an unusual molecule because it does not follow the octet rule by having eight valence electrons around the boron atom. The molecular geometry or shape of CH 2 F 2 is tetrahedral. Its D 3h symmetry conforms with the prediction of VSEPR theory. The molecule has no dipole moment by virtue of its high symmetry. When we draw the lewis structure for BF3, we'll see that there aren't enough electrons available to complete Boron's octet and it only has 6 electrons in the BF3 lewis structure. Put the following molecules in order of decreasing F-X-F bond angle, where X is the central atom. A bond distance (or bond length) is the distance between the nuclei of two bonded atoms along the straight line joining the nuclei. Boron trifluoride. C l= 7. Use the formula below to find the lone pair on the boron atom of the BBr3 molecule. This plane seems like all peripheral atoms exist in one place. The Lewis structure of H 2 O indicates that there are four regions of high electron density around the oxygen atom: two lone pairs and two chemical bonds: Figure (PageIndex{9}). Like with BH 3, the initial drawing of a Lewis structure of BF 3 will form a structure where boron has only six electrons around it. Fluorine is also a halogen element like chlorine. Let’s focus one the following topics. Molecule Shapes - PhET Interactive SimulationsThis is consistent with some degree of π bonding in BF3. 4. In this compound, the boron atom only has six valence shell electrons, but the octet rule is satisfied by the fluorine atoms. 1. IUPAC Standard InChIKey:WTEOIRVLGSZEPR-UHFFFAOYSA-N. The central N-atom has sp 2 hybridization in NO 2–. Hence, each N-Cl bond is a nonpolar covalent bond. It is highly unstable and decomposes above the temperature of -28 degrees Celsius. It is represented by drawing the atoms and their. the hybridization of the central atom; Draw the Lewis structure for SF4 and determine the following: a. The difference between both the values is 1. It is because of the presence of a single lone pair of electrons on the nitrogen atom which is non-bonding in nature and exerts repulsion on the bonding orbitals. The electron geometry of BF 3 is also Trigonal planar, as its central atom, is surrounded by the 3 regions of electron density. A step-by-step explanation of how to draw the BF3 Lewis Dot Structure (Boron trifluoride). Each oxygen has 3 lone pairs. BF3 has trigonal planar geometry. Perchlorate [ClO4]- ion Lewis dot structure, molecular geometry or shape, electron geometry, bond angle, hybridization, formal charges, polar vs. It is corrosive in nature. It helps us understand the bonding and shape of the molecule. 1 4. In this tutorial, we will learn how to draw the lewis structure of BF 3 with all theories. Boron resides in group 13 of the periodic table, boasting three valence electrons, while each fluorine atom originates from group 17, contributing seven valence electrons. The 'octet' rule is based upon available n s and n p orbitals for valence electrons (2 electrons in the s orbitals, and 6 in the p orbitals). The other three structures have. The first step is to sketch the molecular geometry of the IBr3 molecule, to calculate the lone pairs of the electron in the central iodine atom; the second step is to calculate the IBr3 hybridization, and the third step is to give perfect notation for the IBr3 molecular geometry. 6. (0) This blog will basically give a complete piece of. Lewis structure of boron trifluoride (BF 3) is shown below and you can see each fluorine atom has made a single bond with boron atom. BeF2 is a chemical formula for Beryllium fluoride. . SF4’s boiling and melting points are -38. The boiling point of CCl4 is 76. BF 3 is a trigonal planar molecule and all three peripheral atoms are the same. The molecular geometry of ammonia (NH3) is trigonal pyramidal or a distorted tetrahedral. 9 g/mol. Lewis’s definition, which is less restrictive than either the. Some molecules or ions cannot be adequately described by a single Lewis structure. The two compounds can form a Lewis acid-base complex or a coordination complex together. Draw the Lewis structure for boron trifluoride (BF 3). In boron trifluoride ([B{F_3}]),the bonding is relatively simple to model with a Lewis structure if we allow each valence level electron in the boron atom to be shared in a covalent bond with each fluorine atom. Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure may be viewed using Java or Javascript . Molecular geometry, also known as the molecular structure, is the three-dimensional structure or arrangement of atoms in a molecule. If the species is an ion, add or subtract electrons corresponding to the charge of the ion. BeCl2 Lewis Structure. Give the name of the electronic arrangement and the name for the molecular geometry for each of the species. Its vapors are heavier than air. So, the valence electron for bromine is 7 and for fluorine, it is also 7 as both belong to the same group in the periodic table. These four bonds are directed towards the corner of a regular tetrahedron. shape of molecule; Using VSEPR THEORY explain why BF_4^- is a tetrahedral molecule. At low temperatures, the fluorination reaction is used. Solution. the electron pair geometry at the central atom c. IUPAC Standard InChIKey: WTEOIRVLGSZEPR-UHFFFAOYSA-N Copy; CAS Registry Number: 7637-07-2; Chemical structure: This structure is also available as a 2d Mol file or as a computed 3d SD file The 3d structure. It is represented by drawing the atoms and their. Improve this question. In the BrF3 Lewis structure, there are three fluorine atoms bonded to a central bromine atom. If you haven’t understood anything from the above image of BF3 lewis structure, then just stick with me and you will get the detailed step by step explanation. Molecule Shapes - PhET Interactive SimulationsThis is consistent with some degree of π bonding in BF3. The BF3 molecule comprises a central boron (B) atom and three surrounding fluorine (F) atoms. Hybridization of NF3 is Sp³. This model contains three atoms that wrap around one atom in the centre and is referred to as a ‘Trigonal Planar’. domain geometry d. (Note: If you want to know the steps of drawing the AsCl3 lewis dot structure, then visit this article: AsCl3 lewis structure , Or you can also watch this short 2 minute video). This chemistry video tutorial explains how to draw the lewis structure of NO2 also known as Nitrogen Dioxide. In PCl 3 lewis structure, each chlorine atom is joint with center phosphorus atom through a single bond. The boron atom forms three covalent bonds with the fluorine atoms, resulting in a trigonal planar molecular geometry. BF 3 has single bonds between the boron atom and the fluorine atoms and contains no double bonds and an empty p orbital. In BF3, Boron is the least electronegative atom and will be used as the central atom. It is named tetrafluorosilane or silicon tetrafluoride. Structure and bonding The geometry of a molecule of BF3 is trigonal planar. e) N. Figure 1. This is the Lewis electron structure of nitrosyl chloride, a highly corrosive, reddish-orange gas. total. The orbital diagram for the valence shell of phosphorous is: Hence, the third period elements occasionally. It is possible to draw a structure with a double bond between a boron atom and a fluorine atom in BF 3 , satisfying the octet rule, but experimental evidence. #2 Show chemical bond. CCl4 is also named carbon chloride, methane tetrachloride, benziform, and more. For example, in the Lewis structures of beryllium dihydride, BeH 2, and boron trifluoride, BF 3, the beryllium and boron atoms each have only four and six electrons, respectively. The highly polarized B-F bond has a dipole moment that lies opposite to the. Re: BF3 lewis dot structure. 1. Answer 1 Both the Arrhenius and Bronsted lowry theory of acid and bases define on acid as a hydrogen ion ( proton) donor . In PCl 3 lewis structure, each chlorine atom is joint with center phosphorus atom through a single bond. 2 degrees; BrF3 is a polar molecule; Due to the presence of three fluorine atoms linked together, it is a strong fluorinating agent. An explanation of the molecular geometry for the BrF3 (Bromine trifluoride) including a description of the BrF3 bond angles. . Such a reaction is shown below. In general, all legitimate resonance structures for a given molecule will have the same number of double bonds. In the lewis structure of ammonia (NH 3), there are three N-H bonds and one lone pair on nitrogen atom. a. The bond angle in BH 3 is 120º. Since its steric number is 5. $endgroup$Chemistry questions and answers. Steps. The approx bond angle in CH 2 F 2 is based on the type of bond, ∠F-C-H = 109º, ∠H-C-H = 113º, ∠F-C-F = 108. Thus, the Lewis dot symbol for O is. number of non-binding electrons e. Draw connectivities: 3. FC (C) = 4 -½× (4×2) = 0. The electron-dot structure (Lewis structure) for which of the following molecules would have two unshared pairs of electrons on the central atom? Which of the following is an isomer of CH3OCH3 ? Which of the following molecules contains only single bonds? Study with Quizlet and memorize flashcards containing terms like (A) H2O (B) NH3 (C) BH3. Thus far, we have used two-dimensional Lewis structures to represent molecules. Only one of the empty p-orbital is left. There are a total of 24 valence electrons for the BF 3 Lewis structure. A video tutorial on how to draw the Lewis structure of boron trifluoride (BF3), a covalent molecule with 24 valence electrons. 6. total valence electrons they have 2. Copy. Lewis structure of NH 3 can be drawn by starting from valence electrons of nitrogen and hydrogen atoms in several steps. Geometry of Molecules. There are currently 5 valence electrons around the nitrogen. Draw the Lewis structure for boron trifluoride (BF 3). Understanding the molecular structure of a compound can help determine the polarity, reactivity, phase of matter, color, magnetism, as well as the biological activity. However, for aluminum and the heavier Group 13 elements, more than one ligand can. For the I3 - structure use the periodic table to find the total number. A step-by-step explanation of how to draw the I3 - Lewis Dot Structure (Triiodide Ion). Monoisotopic mass 68. 4. The five simple steps are:1. BCl ₃ Lewis Structure. Step #1: Calculate the total number of valence electrons. Lewis Structure of Boron Trifluoride . The overall formal charge in CS2 is zero. 4). The formal charge is the perceived charge on an individual atom in a molecule when atoms do not contribute equal numbers of electrons to the bonds they participate in . In total, we have 4 + (2 x 6) = 16 valence electrons in CO2. But chemistry books I have looked at (Zumdahl Edition 5 and 7) says that it is the opposite. It involves constructing multiple Lewis structures that, when combined, represent the full electronic structure of the molecule. 95 g/cm³; The boiling point is -38 °C; Melting point −121. If the. Home / Gallery / Boron trifluoride-BF3. Three fluorines are bonded to a central bromine. XeF 4 is the chemical formula for xenon tetrafluoride, the first discovered binary compound of a noble gas. But wait, we also have to look at the molecular geometry of NCl3 to know whether it has a symmetric shape. Draw the Lewis structure for each one and then describe the electron-pair geometry and the molecular geometry. Follow these simple steps to draw Lewis dot structures: Draw the atoms on paper and put dots around them to represent valence electrons of the atom. Formaldehyde is an organic compound that appears as a colorless gas with the chemical formula CH2O. A step-by-step explanation of how to draw the BrF3 Lewis Dot Structure (Boron trifluoride ). (a) Draw the Lewis structure of the. The melting and boiling point of silicon tetrafluoride is -95. For example, in the Lewis structures of beryllium dihydride, BeH 2, and boron trifluoride, BF 3, the beryllium and boron atoms each have only four and six electrons, respectively. Moreover, as there exist sigma bonds only and one 2s and three 2p orbitals of the carbon produce four new hybrid orbitals, the hybridization of CH4 is sp3. (Valence electrons are the number of electrons present in the outermost shell of an atom). Molecular geometry, also known as the molecular structure, is the three-dimensional structure or arrangement of atoms in a molecule. This results in a deformed or twisted trigonal bipyramidal structure, and because the charge distribution on its atoms is non-uniform, the BrF3. Since it is linear in shape with an arrangement like S=C=S. . For example, in the Lewis structures of beryllium dihydride, BeH 2, and boron trifluoride, BF 3, the beryllium and boron atoms each have only four and six electrons, respectively. Step #3: Put two electrons between the atoms to represent a chemical bond. The. The BF3 molecule comprises a central boron (B) atom and three surrounding fluorine (F) atoms. It is an odorless white solid also known as fluoride salt of beryllium. Draw and explain the Lewis structure of the most important resonance form of the ion ClO2-. To find formal charges in a Lewis structure, for each atom, you should count how many electrons it "owns". Match the central atom in each of the following with the proper hybridization. 4 (amidase) inhibitor, an algal metabolite and an Escherichia coli metabolite. 004517 Da. Since its steric number is 3. For example, in the Lewis structures of beryllium dihydride, BeH 2, and boron trifluoride, BF 3, the beryllium and boron atoms each have only four and six electrons, respectively. Boron resides in group 13 of the periodic table, boasting three valence electrons, while each fluorine atom originates from group 17, contributing seven valence electrons. BF3, which is commonly referred to as boron trifluoride, is a molecule that covalently bonds that has trigonal planar molecular geometry. Once again, we have a compound that is an exception to the octet rule.