KEMINO2 - LE3, COORDINATION CHEM

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

• ionic

• coordinate covalent

• pi back bond

• sigmatropic

• homolytic bond

Answer explanation

coordinate covalent bond occurs as ligand provides both bonding electrons towards the metal

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

• metal

• ligand

• covalent bond

• counterions

Answer explanation

counterions are part of the secondary coordination sphere

e.g. primary = [CO(NH3)6]³⁺

secondary = 3Cl^-

What ligand doesnt exist

• cationic ligand

• anionic ligand

• neutral ligand

Answer explanation

since ligands act like a lewis base they should at least be neutral so as to be an electron donor and not an electron acceptor

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

• anionic

• neutral

• polydentate

• ambidentate

Answer explanation

polydentate have multiple binding atoms (called chelating ligands) that can all bond at once to one metal center like en

ambidentate is like nitro vs nitrito based on whether it bonds to N or O

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

• +2

• +1

• 0

• -1

• -2

Answer explanation

OS metal + OS ligand = charge of ion (can be found by opposite the charge of counterions)

Dithiocyanato-S-aurate(I)

• [Au(SCN)2]

• [Au(SCN)2]-1

• [Ag(SCN)2]-1

• [AgSCN2]-1

[Ru(CO)5]

• Ruthenium pentacarbonyl

• Pentacarbonylruthenium (0)

• Rubidium pentacarbonyl

• Pentacarbonylrubidium(0)

Choose the odd one out

• Ionization isomers

• Hydrate isomers

• Linkage isomers

• Coordination isomers

• Geometric isomers

Answer explanation

Which two isomers are MOST similar

• Hydrate isomers

• Linkage isomers

• Coordination isomers

• Ionization isomers

• Optical isomers

Answer explanation

Both hydrate and ionization isomerism switch out a ligand in the primary coordination sphere and switch it with either a counterion or a solvents

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

• coordination

• hydrate

• ionization

• linkage

Answer explanation