Consider the following isomers of iron(II) coordination compound: 

What are the names and formulas for the compounds?

Consider the octahedral complex [Ni(tren)BrCl]²⁺, where tren has a formula of N(CH₂CH₂NH₂)₃ and can be simplified as:

.

(a)  The tren is tetradentate. Define tetradentate and explain how tren is considered to be tetradentate.

(b)  Sketch all possible stereoisomers of [Ni(tren)BrCl]²⁺ and classify each stereoisomer as either chiral or achiral.

The octahedral complex [Sc(H₂O)₃(CN)₃] reacts with HF and produces a complex [Sc(H₂O)₄F₂]⁺. The two F ligands are trans to one another.

a) Sketch the two possible stereoisomers of the starting material [Sc(H₂O)₃(CN)₃].

b) Identify which of the two starting isomers could produce the observed product, assuming that the CN groups remain in place.

Oxalates in food have been linked to a number of health issues, including hypercalcemia and kidney stone formation. What is the structure of [Co(C₂O₄)₃]³⁻? Is it achiral or chiral?

The structures of diethylenetriamine complexes are shown below. 

i) Categorize each isomer as either chiral or achiral.

ii) Draw the enantiomer of each chiral complex.

iii) Identify the pair of chiral complexes that are enantiomers.

The structures below show complexes of catecholate.

i. Classify each complex as either chiral or achiral.

ii. Sketch the enantiomer of each chiral complex.

iii. Identify the pair of chiral complexes that are enantiomers.