Gold(I) alkynyl complexes derived from ethynylanilines: crystal structure of [Au(Ctriple bond; length of mdashC-4-C6H4NH2){P(3-tolyl)3}] a polymer in the solid state via NH⋯Au contacts

Reaction of [AuCl(SMe2)] with para-ethynylaniline and para-ethynyl-ortho-toluidine affords oligomers, [Au(Ctriple bond; length of mdashC-4-C6H3RNH2)]n (R = H, Me), which in turn react with tertiary phosphines or 2,5-dimethylphenylisocyanide to give monomeric adducts, [Au(Ctriple bond; length of mdashC-4-C6H3RNH2)L]. One of these, [Au(Ctriple bond; length of mdashC-4-C6H4NH2){P(3-tolyl)3}], has been crystallographically characterised and is a polymer in the solid state, being held together via NH⋯Au contacts.