Palladium complexes, cyclohexyl isocyanide

The addition of cyclohexyl isocyanide to several palladium(II) methyl complexes has proven particularly interesting 169, 170). From... 

Carbon-transition metal bonds can also be formed by cocondensing transition-metal atoms with isonitriles. Thus, using Ni and Fe with t-butyl isocyanide, methyl isocyanide, cyclohexyl isocyanide and vinyl isocyanide the NiL4 and FeL, complexes are formed. Palladium cocondensed with isonitriles yields PdLj polymeric structures with terminal and bridged isonitrile ligands ... 

The first multiple insertion of isocyanide into the Pd-C bond of organopal-ladium complexes was reported by Yamamoto in 1970 (Scheme 21) [30]. The reaction of one, two, and three equivalents of cyclohexyl isocyanide with the trans-iodobis(phosphine)methylpalladium(II) complexes 17 yielded the monoimino (18), bisimino (19), and trisimino (20) palladium complexes, re-... 

In the other study [41], Pd-bis(azido) compounds [Pd(dppn)(N3)2], [Pd(dppf)(N3)2], and [Pt(l-dpn)(SMe2)(N3)2] [dppn, l,8-bis(diphenylphosphino)naphthalene dppf, l,10-bis(diphenylphosphino)ferrocene 1-dpn 1-diphenyl-phosphinonaphthalene] underwent [2 -p 3] cycloaddition with isocyanides R NC (R = cyclohexyl, rBu, 2,6-dimethylphenyl) to convert azido ligands to five-membered, C-coordinated tetrazolate rings. In a related study [42], alkynyl palladium(II)-azido species of the type [Pd(N3)(C=CR)PMe3] reacted with rBuNC to give corresponding complexes with C-bound tetrazolates. 

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