Hafnium complexes cyanides

Very little is known about cyanide complexes of zirconium(IV) or hafnium(IV). Just one compound has been reported. [Hf(CN) N(SiMe3)2 3] (m.p. 170-172 °C dec. v(CN) 2160 cm-1) has been prepared by reaction of [HfCl N(SiMe3)2 3] with Me3SiCN in toluene at reflux.33... 

Reactions of monochloro complexes of zirconium and hafnium stabilized by tripodal trianionic ligands (such as MeC(CH2NR)3 , HC(SiMe2NR)3 - and MeSi(SiMe2 NR)3 ) with the late transition metal organometallic complexes K[CpM(CO)2] (M = Fe, Ru) gives heterodinuclear complexes with unbridged metal-metal bonds. These het-erobimetallic complexes react with, for example, methyliso-cyanide to yield insertion products (Scheme 6). ... 

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See also in sourсe #XX -- [ ]

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