171

Question 1

Zin Octahedral

Answer 1

destablized along Z axis, Z orbitals go to higher energy

and bonds along Z get shorter

Question 2

Zout Octahedral

Answer 2

stablizes along Z axis, Z orbitals go to lower energy and bonds along Z get longer

Question 3

Zin tetrahedral

Answer 3

stabilizes along Z axis, Z orbitals go to lower energy, and tetrahedron flattens

Question 4

Zout tetrahedral

Answer 4

destabilizes along Z axis, and tetrahedron elongates

Question 5

D config for sq planar

Answer 5

D8 and l.s.

Question 6

Associative mechanism requirements

Answer 6

need empty t2g orbitals –> d0, d1, d2

Question 7

Dissociative mechanism requirements

Answer 7

need filled eg* orbitals –> d4 h.s., d5 h.s., d6 h.s., d7, d8, d9, d10

Question 8

Inert d configs

Answer 8

d3, d4, d5, d6 l.s.

Question 9

Si:0 1:4

Answer 9

isolated (SiO4)4-, Td

Question 10

Si:0 1:3.5

Answer 10

(Si2O7)6- dimer, Td

Question 11

Si:0 1:3

Answer 11

chains or rings

Question 12

Si:0 1:2.5

Answer 12

sheets (mica)

Question 13

Si:0 1:2.0

Answer 13

SiO2, 3D structure

Question 14

ABCABC

Answer 14

CCP = FCC

Question 15

ABABAB

Answer 15

HCP

Question 16

Is BCC close packed?

Answer 16

no

Question 17

malleability of CCP=FCC

Answer 17

4 slip planes – very malleable

Question 18

malleability of HCP

Answer 18

1 slip plane – somewhat malleable

Question 19

malleability of BCC

Answer 19

no slip planes bc not close packed – not malleable

Question 20

FCC holes

Answer 20

8 Td sites (all internal), 4 Oh sites (12 on edhes, 1 in middles)

Question 21

O2 and after Mo diag

Answer 21

sigma, pi, pi*, sigma

Question 22

N2 and before MO diag

Answer 22

pi, sigma, pi, sigma

Question 23

18 e- rule for 1st row metal with weak field ligand

Answer 23

12e- to 22 e-

Question 24

18 e- rules followed

Answer 24

need a good pi bonding ligand (CO, CN-, PR3)

Question 25

12-22 e-

Answer 25

1st row TM and med to poor ligand; non pi bonding e.g. Cl)

Question 26

12-18 e-

Answer 26

2nd or 3rd row TM and med to poor ligand (non pi bonding)