Isomerism in d-block metal complexes

In this book so far, we have not mentioned isomerism very often, and most references have been to trans- and 

Ionization isomerism Hydration isomerism Coordination isomerism Linkage isomerism Polymerization isomerism 

Draw possible structures for the square planar complexes PtBr2(py)2l and [PtCl3(PEt3)j and give names to distinguish between any isomers that you have drawn. 

In Ru(CO)4(PPh3)j, the Ru centre is in a trigonal bipyramidal environment. Draw the structures of possible isomers and give names to distinguish between them. 

Draw the structures and name the isomers of octahedral CrCl2(NH3)4l+. 

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