(TERTIARY PHOSPHINE)GOLD(I) DERIVATIVES OF 2-PYRIDONES

Article abstract of DOI:10.1016/0022-328X(85)80357-0

Reaction of (R3P)AuCl with some 1-unsubstituted 2-pyridones and alkali in homogeneous or heterogeneous medium has given (R3P)AuQ compounds (QH is 2-pyridone, 3-nitro-, 5-chloro-, or 6-methyl-pyridone; R is t-Bu, cyclo-hexyl, phenyl, or 1-naphthyl).Combined infrared and NMR evidence indicates that the compounds are derived from the 2-pyridone tautomer, the metal being in the 1-position.An X-ray crystal structure determination carried out on Ph3PAu(6-methylpyridonato-N)*H2O*0.5C6H6, the first structural analysis on a derivative in which the Q ligand is monodentate, reveals that the pyridonato-N ligand is derived from the keto-tautomer, the C=O distance being 1.23(2) Angstroem, and that the coordination around the gold atom is approximately linear (P-Au-N 173.4(3) deg), with Au-N 2.077(9), Au-P 2.236(3) Angstroem and no metal-metal interaction.