Coordinate Compounds

Question 1

Coordinate compounds

Answer 1

Those compounds in which metal atoms or ions are bonded to ions or neutral molecules by coordinate bond

Question 2

The product written in [] is called __ and outside is __

Answer 2

Complex part; counter ion

Question 3

Product when Cuso4 + nh3

Answer 3

[Cu(NH3)⁴]SO⁴

Question 4

Product of NiCl² + 4nh3

Answer 4

[Ni(nh3)⁴]Cl

Question 5

Ligands are

Answer 5

Charged ions or neutral molecules that can give 2 e’s to form coordinate bond

Question 6

How many ions will form when h20 + [Co(nh3)⁴Cl²]Cl?

Answer 6

2, i.e [Co(nh3)⁴Cl²] & Cl

Question 7

Which will ionise in solution, Double salt or coordinate compds?

Answer 7

Double salt

Question 8

Monodentate/unidentate ligands

Answer 8

Ligands which are able to form only 1 coordinate hond

Question 9

Examples of monodentrate

Answer 9

NH³,H2O,PH³,P(C⁶H⁵)³,CH³-NH²
charged ligands like hallides, OH, NO², NO³

Question 10

Ambidentate ligands

Answer 10

Ligands that can form bonds in 2 ways by 2 atoms

Question 11

Ambidentate ligands examples

Answer 11

A metal with NO², SCN

Question 12

Bidentate ligands

Answer 12

Ligands which can form only 2 bonds

Question 13

Ex of bidentate

Answer 13

NH²–CH²-CH²–NH² where N has 1 lone pair, oxalic acid,glycine

Question 14

Coordination compounds of Mg, Fe & Co

Answer 14

Chlorophyll,haemoglobin & Vitamin B¹²

Question 15

Applications of coordination compounds

Answer 15

Electroplating, textile dyeing & medicinal chemistry

Question 16

Ex of double salts

Answer 16

Carnallite,KCl.MgCl2.6H2O,Mohr’s salt,potash alum

Question 17

Central atoms are also called

Answer 17

Lewis acids

Question 18

Number of ligating groups are called

Answer 18

Denticity of the ligand

Question 19

Oxalic acid structure

Answer 19

HooC-CooH

Question 20

Among amino acids, which one is optically inactive

Answer 20

Glycine ²HN-CH²-COOH since it is not chiral

Question 21

Ex of hexadentate ligands

Answer 21

Ethylene diamine tetraacetate ion(EDTA⁴-), [Co(en)³]³+

Question 22

Among [Co(Nh3)⁶]³+ and [Co(en)³]³+ which is more stable?

Answer 22

[Co(en)³]³+ since it forms a ring structure

Question 23

Chelate ligand

Answer 23

Di- or polydentate ligand that uses its 2 or more atoms to bind

Question 24

Which complex is more stable? Chelate or unidendate?

Answer 24

Chelate

Question 25

Coordination polyhedral

Answer 25

Shape of the complex decided by no of bonds formed

Question 26

Coordination number

Answer 26

The no of coordination bonds the ligands are forming with metal

Question 27

Homoleptic vs heterolyptic complex

Answer 27

All ligands are same; different

Question 28

Cation complex

Answer 28

Complexes with only +vely charged part

Question 29

OH- name

Answer 29

Hydroxo

Question 30

NO² name

Answer 30

Nitrito-N or nitrito-O

Question 31

SO⁴ name

Answer 31

Sulphato

Question 32

(CO³)²- name

Answer 32

Carbonato

Question 33

Nh3 name

Answer 33

Ammine

Question 34

H20 & CO name

Answer 34

Aqua; carbonyl

Question 35

NO name

Answer 35

Nitrocyl

Question 36

(C2O8)²- name

Answer 36

Oxalato

Question 37

Werner’s theory

Answer 37

A metal ion has a primary & secondary valence where primary is satisfied by ions & secondary by ligands

Question 38

Postulates of werner’s theory

Answer 38

Metals show 2 linkages-primary & sec
Primary are satisfied by -ve ions and are ionisable
Secondary are non-ionisable & satisfied by neutral molecules
Ions bound by sec have spatial arrangements

Question 39

Elements from 20 to 30

Answer 39

Sc,Ti,Vi,Cr,Mn,Fe,Co,Ni,Cu,Zn

Question 40

Valence bond theory

Answer 40

Metal atoms or ion under the influence of ligands can use its orbitals for hybridization to yield a set of equivalent orbitals of definite geometry

Question 41

Why is [Co(nh3)⁶]³+ diamagnetic?

Answer 41

Absence of unpaired electrons

Question 42

Spin magnetic moment

Answer 42

No of unpaired electrons
Myu = [(n+2)n]½ BM

Question 43

Myu is 0 for

Answer 43

Diamagnetic substances

Question 44

2 exceptions btw 20 and 30 Atomic nos

Answer 44

Cromium and Copper

Question 45

If a substance has d²sp³ it is

Answer 45

An inner orbital complex

Question 46

How to identify strong and weak ligands

Answer 46

C>N>O>X

Question 47

Hybridisation & shape of 4 ligands

Answer 47

sp³ - tetrahedral
dsp² - square planar

Question 48

Hybridisation & shape of 5 ligands

Answer 48

dsp³ & sp³d - trigonal bipyramidal

Question 49

Hybridisation & shape of 6 ligands

Answer 49

sp³d² or d²sp³ - octahedral

Question 50

Total magnetic moment

Answer 50

Orbital MM + spin MM

Question 51

Drawbacks of VBT

Answer 51

Doesn’t tell why some subs are inner orbital and outer orbritsl complexes
Doesn’t differentiate b/n strong & weak ligands
In some, actual MM & calculated MM are not same
Couldn’t explain why [Cu(NH3)⁴]²+ is square planar & not tetrahedral
Couldn’t explain why some NI(||) complexes are paramagnetic

Question 52

Crystal field theory

Answer 52

When a metal atoms or ion is surrounded by -vely charged ligands, electrostatic forces exist b/n them (ionic bond).
Ligands are point -ve charges.
Degeneration of metal orbitals are lost due to repulsion b/n orbitals.
D-orbitals will be split according to the geometry of the complex

Question 53

Among d(xy), d(yz), d(xz), d(x²-y²) & d(z²), which has more energy?

Answer 53

d(x²-y²) & d(z²)

Question 54

Energy difference caused due to splitting is

Answer 54

Crystal field splitting theory
Denoted by delta°