Chapter 10

Chapter 10 - CHAPTER 10 CHEMICAL BONDING II MOLECULAR GEOMETRY AND HYBRIDIZATION OF ATOMIC ORBITALS 10.7(a The Lewis structure of PCl3 is shown

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
CHAPTER 10 CHEMICAL BONDING II: MOLECULAR GEOMETRY AND HYBRIDIZATION OF ATOMIC ORBITALS 10.7 (a) The Lewis structure of PCl 3 is shown below. Since in the VSEPR method the number of bonding pairs and lone pairs of electrons around the central atom (phosphorus, in this case) is important in determining the structure, the lone pairs of electrons around the chlorine atoms have been omitted for simplicity. There are three bonds and one lone electron pair around the central atom, phosphorus, which makes this an AB 3 E case. The information in Table 10.2 shows that the structure is a trigonal pyramid like ammonia. P Cl What would be the structure of the molecule if there were no lone pairs and only three bonds? (b) The Lewis structure of CHCl 3 is shown below. There are four bonds and no lone pairs around carbon which makes this an AB 4 case. The molecule should be tetrahedral like methane (Table 10.1). C H (c) The Lewis structure of SiH 4 is shown below. Like part (b), it is a tetrahedral AB 4 molecule. Si H H H H (d) The Lewis structure of TeCl 4 is shown below. There are four bonds and one lone pair which make this an AB 4 E case. Consulting Table 10.2 shows that the structure should be that of a distorted tetrahedron like SF 4 . Te Are TeCl 4 and SF 4 isoelectronic? Should isoelectronic molecules have similar VSEPR structures?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CHAPTER 10: CHEMICAL BONDING II 263 10.8 Strategy: The sequence of steps in determining molecular geometry is as follows: draw Lewis ⎯⎯→ find arrangement of find arrangement determine geometry structure electrons pairs of bonding pairs based on bonding pairs Solution: Lewis structure Electron pairs Electron Lone pairs Geometry on central atom arrangement (a) Al Cl 3 trigonal planar 0 trigonal planar, AB 3 (b) Zn 2 linear 0 linear, AB 2 (c) Zn 2 4 tetrahedral 0 tetrahedral, AB 4 10.9 Lewis Structure e pair arrangement geometry (a) C Br Br Br Br tetrahedral tetrahedral (b) B Cl Cl Cl trigonal planar trigonal planar (c) N F F F tetrahedral trigonal pyramidal (d) Se HH tetrahedral bent (e) NO O trigonal planar bent 10.10 We use the following sequence of steps to determine the geometry of the molecules. draw Lewis find arrangement of find arrangement determine geometry structure electrons pairs of bonding pairs based on bonding pairs
Background image of page 2
CHAPTER 10: CHEMICAL BONDING II 264 (a) Looking at the Lewis structure we find 4 pairs of electrons around the central atom. The electron pair arrangement is tetrahedral. Since there are no lone pairs on the central atom, the geometry is also tetrahedral . C H H H I (b) Looking at the Lewis structure we find 5 pairs of electrons around the central atom. The electron pair arrangement is trigonal bipyramidal. There are two lone pairs on the central atom, which occupy positions in the trigonal plane. The geometry is t-shaped .
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This homework help was uploaded on 04/21/2008 for the course CHEM 112 taught by Professor Heglund during the Spring '08 term at SDSMT.

Page1 / 22

Chapter 10 - CHAPTER 10 CHEMICAL BONDING II MOLECULAR GEOMETRY AND HYBRIDIZATION OF ATOMIC ORBITALS 10.7(a The Lewis structure of PCl3 is shown

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online