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Ligands Isoelectronic With CO

Ligands Isoelectronic With CO. CS (thiocarbonyl)  better s -donor and better p -acceptor than CO. N 2  a poor ligand (much worse s -donor and p -acceptor) – typically reduced in its complexes CN -  good s -donor, OK p -acceptor – more similar to a halide than CO.

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Ligands Isoelectronic With CO

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  1. Ligands Isoelectronic With CO • CS (thiocarbonyl)  better s-donor and better p-acceptor than CO. • N2 a poor ligand (much worse s-donor and p-acceptor) – typically reduced in its complexes • CN- good s-donor, OK p-acceptor – more similar to a halide than CO. • CNR (isocyanide or isonitrile)  similar to CO but can tune the steric and electronic properties. More reactive for insertion chemistry. • NO and NNR  redox active ligands (linear NO+ or bent NO-) can change the total electron count of a complex (what would you expect for [Cr(NO)4] ?).

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