Reactions Of Complexes 15

Question 1

Associative or dissociative mechanism kis basis pr kahe gye hai

Answer 1

Jab intermediate ka CN. Increase Hota Hai to us mechanism ko associative Kahte hai aur jab decrease Hota Hai to dissociative Kahne hai

Question 2

Explain steps of dissociative mechanism

Answer 2

1. Removal of ligand and form intermediate of low CN.
   2, addition of ligand

Question 3

Geometry of intermediate in dissociative mechanism

Answer 3

CN. Is 5 so geometry could be TBP,Square pyramidal
But mostly square pyramidal

Question 4

Dissociative mechanism favoured by

Answer 4

High CN. Complexes like octahedral complexes

Question 5

Rate of dissociative mechanism

Answer 5

Rate = depends on substrate
So order of rxn is 1
SN1 limiting rxn

Question 6

Associative mechanism steps

Answer 6

Addition of ligand to substrate forming intermediate of high CN.
Removal of ligand

Question 7

The geometry of intermediate in associative mechanism

Answer 7

TBP

Question 8

Rate of associative mechanism

Answer 8

Substrate as well as incoming ligand
Order is 2
SN2 limiting

Question 9

Steps of interchange mechanism

Answer 9

Single step rxn like SN2
No intermediate formation only TS. Formation

Question 10

Types of interchange meachanism

Answer 10

Two
IA,ld

Question 11

Factors affecting rate of dissociative mechanism dissociative mechanism

Answer 11

Rate inversely proportional to the metal and leaving group bond strength
So ,it depends on Zeff of metal ,HSAB ,JTD
CFSE,TRANS EFFECT ………..(STERIC EFFECT)

Question 12

In dissociative mechanism and associative rate relation with the pı donates ligamdd

Answer 12

1. Directly proportional
2. Inversely proportional….dirctlyproportional with pi accepted ligand

Question 13

Dissociative and associative relation with steric crowding

Answer 13

1. Directly proportional
   2.inversly proportional

Question 14

In non transition metal how can we determine the rate of reaction

Answer 14

For non transition metal rate is inversely proportional to zeff [ OS, size ]

Question 15

For transition metal complex how can we determine labilenes

Answer 15

1, high JTD
2. Low CFSE
3. Weak MX bond

Question 16

Which d block compound is labile and very high labile

Answer 16

Labile = d¹,d²,d⁷
Very labile = d⁴ (HS),d⁵ (HS), d⁹

Question 17

Moderate inert
Very inert

Answer 17

1. d⁸
2. d³,d⁶ (LS)

Question 18

Overall order of labileness

Answer 18

d⁴ ( HS) >d⁹> d⁷>d⁸>d³

Question 19

Transition metal non TM
3d
4d
5d

Answer 19

In non size increase labileness increase I
In TM just opposite

Question 20

SP
TD
OH

Answer 20

Labile
Labile
L and I

Question 21

Lecture 17 30