F. Bonati, A. Burini, B. Pietroni
Apr 12, 1988
Citations
0
Influential Citations
37
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract Imidazole (QH) or pyrazolone (Q′H2) in QAuL or (LAu)2Q′ (where L is a tertiary phosphine) is displaced by some acidic reagents HZ, where HZ = terminal acetylene, imide, thiol, dithio acid, or HI, to give ZAuL. If Z− is not a soft ligand an adduct between the ragents is obtained, and this is formulated as a protonated species, e.g. [LAuQH]+Z− (HZ = picric acid). In other cases the adduct is LAuZ · HQ (rather than LAuQ · HZ or a protonated species), in which the displaced QH is hydrogen-bonded to the product, as shown by the crystal structure of the adduct 1-methyl-2(cyclohexylphosphinegoldthiolato)imidazole sd 2benzimidazole. In this species gold(I) is two-coordinated (PAuS 172.0(1)), with AuP and AuS 2.292(3) and 2.331(3) A, respectively; the first benzimidazole is hydrogen-bonded to N(3) of the imidazole, and the second benzimidazole to the N(3) of the first, the inter-diazole N⋯HN distance being 2.81 and 2.86(1) A, respectively.