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KEMINO2 - LE3, COORDINATION CHEM

Total questions: 45

Worksheet time: 25mins

Name
Class
Date
1.

what kind of bond is found between the metal and ligand of a transition metal complex

a)

ionic

b)

coordinate covalent

c)

pi back bond

d)

sigmatropic

e)

homolytic bond

2.

What is not likely to be found in a primary coordination sphere

a)

metal

b)

ligand

c)

covalent bond

d)

counterions

3.

What ligand doesnt exist

a)

cationic ligand

b)

anionic ligand

c)

neutral ligand

4.

what type of ligand has multiple binding sites, but can only use one site at a time

a)

anionic

b)

neutral

c)

polydentate

d)

ambidentate

5.

What is the O.S. (oxidation state) of Cu in [CuH4]2-

a)

+2

b)

+1

c)

0

d)

-1

e)

-2

6.

Dithiocyanato-S-aurate(I)

a)

[Au(SCN)2]

b)

[Au(SCN)2]-1

c)

[Ag(SCN)2]-1

d)

[AgSCN2]-1

7.

[Ru(CO)5]

a)

Ruthenium pentacarbonyl

b)

Pentacarbonylruthenium (0)

c)

Rubidium pentacarbonyl

d)

Pentacarbonylrubidium(0)

8.

Choose the odd one out

a)

Ionization isomers

b)

Hydrate isomers

c)

Linkage isomers

d)

Coordination isomers

e)

Geometric isomers

9.

Which two isomers are MOST similar

a)

Hydrate isomers

b)

Linkage isomers

c)

Coordination isomers

d)

Ionization isomers

e)

Optical isomers

10.

This type of isomerism is observed when a complex has two or more metal atoms

a)

coordination

b)

hydrate

c)

ionization

d)

linkage

11.

This type of isomerism is observed when a complex uses an ambidentate ligand

a)

coordination

b)

hydrate

c)

ionization

d)

linkage

12.

Describe the geometry of the ligand

a)

cis

b)

trans

c)

fac

d)

mer

13.

Describe the geometry of the ligand

a)

cis

b)

trans

c)

fac

d)

mer

14.

Which symmetries indicate chirality

a)

Oh

b)

Td

c)

A1g

d)

Cn

e)

Dn

15.

What feature serves to increase the chirality of a complex/compound

a)

double bonds

b)

non bonding electrons

c)

triple bonds

d)

rings

16.

what is not a factor that affects coordination geometries

a)

more bonds = more stability

b)

d orbital degeneracy

c)

sterics

d)

crystal packing effects

e)

solvation effects

17.

Which coordination numbers are most common

a)

CN4-6

b)

CN1-3

c)

CN7-9

d)

CN10-16

18.

Which coordination numbers are least likely for metal complexes

a)

CN 1 and 16

b)

CN 4 and 5

c)

CN 3 and 7

d)

All our equally likely

19.

Which coordination is common for Cu, Ag, and Au

a)

CN 2

b)

CN 3

c)

CN 4

d)

CN 5

20.

Which CN 4 geometry is best with 2 lone pairs

a)

see saw

b)

trigonal bipyramidal

c)

tetrahedral

d)

square planar

21.

why is it easy for CN5 complexes (trigonal bipyramidal and square pyramidal) to interconvert

a)

usually water soluble

b)

point charges are variable and unstable

c)

because they have small energy differences

d)

interconversion provides resonance and extra stability

22.

What are Jahn teller distortions

a)

compressions or elongations of all metal ligand bonds

b)

compressions along the y axis

c)

elongations and compressions along the z axis

d)

the conversion from CN6 to CN5 complex

23.

where do capped versions of a trigonal prismatic coordination complex go

a)

on the triangle parts

b)

on the rectangle parts

c)

along the x axis of the metal

d)

along the y axis of the metal

e)

along the z axis of the metal

24.

What factors make it possible for CN of 10 - 16

a)

large metals

b)

small metals

c)

large ligands

d)

small ligands

25.

What is a limitation of Valence Bond Theory for Coordination Chemistry

a)

only accounts for up to 4p hybridization

b)

cannot explain spectroscopic properties

c)

inaccurate magnetic property prediction

d)

explains equal bonds

e)

cannot account 3d complexes

26.

What is not something electronic structure theories seek to explain for coordination compounds

a)

thermodynamic data

b)

magnetic moment

c)

electronic spectra

d)

geometry

e)

resonances

27.

In crystal field theory, the 3d orbitals split into _________

a)

3 eg orbitals

b)

2 eg orbitals

c)

2 t2g orbitals

d)

3 t2g orbitals

28.

What is the CFSE of the following configuration

a)

0 Δ0\Delta0

b)

-0.6 Δ0\Delta0

c)

2 Δ0\Delta0

d)

0.4 Δ0\Delta0

e)

-0.4 Δ0\Delta0

29.

Identify this complex by its molecular orbital diagram

a)

octahedral

b)

tetrahedral

c)

square planar

d)

square pyramidal

30.

Which metal can experience high spin or low spin configuration

a)

d0

b)

d1

c)

d5

d)

d9

e)

d10

31.

Πc\Pi c indicates _____

a)

destabilization

b)

stabilization

c)

from electron repulsion in same orbital

d)

electrons with parallel spin in degen orbitals

32.

What is not true about pi donor ligands

a)

preferred for high O.S. metals

b)

preferred for high electron count

c)

decrease energy difference between eg and t2g

d)

contains at least one lone pair of electrons

33.

Pi back bonding _______ the multiple ligand bond

a)

strenghtens

b)

weakens

34.

Identify the effect shown here

a)

pi bonding

b)

pi donor

c)

pi acceptor

d)

low spin high spin conversion

35.

which ligand is likely to not change the Δ0\Delta0 that much

a)

I

b)

Br

c)

H2O

d)

CN

e)

NO2

36.

Which metal will always exhibit low spin configuration

a)

Sc

b)

Ti2+

c)

Cu+

d)

Hg

e)

Mn

37.

Why is magnitude highest in interaction with z axis

a)

most overlap/ repulsion

b)

least overlap/repulsion

c)

larger orbitals are involved

d)

smaller orbitals are invovled

38.

What causes a drop in the energy of the dz2 orbitals?

a)

in phase stabilization with equatorial ligands

b)

out of phase stabilization between ring and ligands

c)

removal of ligand-pi interaction along the z axis

d)

less bonds = more stability because less repulsion and steric strain between ligands

39.

what type of complex is this based on the molecular orbital diagram

a)

tetrahedral

b)

linear

c)

octahedral

d)

square planar

40.

Why are t2 orbitals higher energy and e orbtials in tetrahedral complexes

a)

dz2 and x2-y2 are along axes

b)

point charges of ligands are along the axis

c)

point charges of ligands are between the axes

d)

dz2 and x2-y2 are located between axes

41.

Which complexes can NEVER be low spin

a)

4d metal complexes

b)

4d octahedral metal complexes

c)

5d metal complexes

d)

3d octahedral metal complexes

e)

3d tetrahedral metal complexes

42.

Which orbitals are stabilized from the conversion of a complex from octahedral to square planar

a)

xy

b)

yz

c)

z2

d)

x2-y2

e)

xz

43.

Will the following experience JT Distortion?

a)

yes

b)

no

44.

Which scenario produces the strongest JT distortion

a)

equally occupied t2g

b)

equally occupied eg

c)

unequally occupied t2g

d)

unequally occupied eg

45.

How do you compare the total energies of an octahedral complex and a square planar complex according to AOM

a)

octahedral has more energy from more bonds

b)

square planar has more energy from more overlap despite less bonds

c)

they are equal

d)

depends on whether its in phase or out of phase

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