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Carbene complexes from the reaction of ionic isocyanide complexes of gold(I) with alcohols and amines

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
102
Issue
3
Identifiers
DOI: 10.1016/s0022-328x(00)95206-9
Disciplines
  • Mathematics

Abstract

Abstract The synthesis and properties of several new types of carbene complexes obtained by reaction of the ionic gold(I) isocyanide complexes, [(RNC) 2Au] +, (R = p-CH 3C 6H 4, C 6H 11) with alcohols ROH (R = CH 3, C 2H 5) and amines RR′NH (R = H; R′ = p-FC 6H 4, p-CH 3C 6H 4, C 6H 5CH 2, CH 3, C 6H 11, o,o′-[(CH 3) 2C 6H 3; R = CH 3, R′ = C 6H 5), are described. Both bis-carbene [(carbene) 2Au] + and monocarbene [(carbene)(RNC)Au] + complexes can be obtained according to the nature of the parent complex and of the nucleophilic agent. As evidenced by their NMR spectra, the bis-carbene complexes are obtained as a mixture of geometrical isomers which in the case of [{( p-CH 3C 6H 4NH)(C 2H 5O)C} 2Au]ClO 4 were separated by fractional crystallization. The carbene ligand can be easily displaced with triphenylphophine yielding the mixed complexes [(carbene)(PPh 3)Au] +; in the case of a diaminocarbene the displaced ligand rearranges to give the corresponding formamidine, HC(NR)NHR.

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