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Co-ordination Chemistry of Dimethylgold(III). Synthesis, Spectroscopic, and Structural Studies of Complexes With Neutral Aromatic Nitrogen-donor Ligands

DOI: 10.1039/DT9820001795

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1795 - 1802 (1982)

Update date:2022-08-18

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Authors:

Canty, Allan J.Canty, Allan J.

Minchin, Nigel J.Minchin, Nigel J.

Healy, Peter C.Healy, Peter C.

White, Allan H.White, Allan H.

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Article abstract of DOI:10.1039/DT9820001795

Dimethylgold(III) nitrate reacts with neutral ligands to form the complexes NO3*H20 (tpm = tri-2-pyridylmethane) and NO3 .The crystal structures of complexes of tpzm, tpm, and dpt have been determined by single-crystal X-ray diffraction at 295 K and refined by least-squares methods to R = 0.033, 0.029, and 0.042 for 3 043, 1 616, and 2 529 independent ' observed ' reflections, respectively.In these structures the (1+) cations have essentially cis-square-planar co-ordination for gold(III), AuC2N2, with Au-C 2.023(7)-2.041(12) Angstroem and Au-N 2.127(8)-2.142(8) Angstroem.In complexes of the potential tridentate ligands one pyridyl group is not co-ordinated in the tpm complex, and one pyrazolyl group is involved in a weak axial Au...N interaction <3.139(7) Angstroem> in the tpzm complex.Comparison of the (1)H n.m.r. spectra of complexes of the potentially tridentate ligands (tpzm, tpm, and tpmo) with model complexes of bidentate ligands (dbzm, dpm, and dpt) suggests that the co-ordination behaviour of the ligands in methanol resambles that found in solid state.Crystal data: NO3, monoclinic, space group P21/n, a = 16.72(1), b = 9.662(3), c = 10.700(4) Angstroem, β = 107.83(3)o, Z = 4; NO3*2H2O, orthorhombic, space group P212121, a = 18.56(1), b = 11,150(7), c = 9.983(7) Angstroem, Z = 4; NO3, monoclinic, P21/n, a = 14.142(6), b = 13.012(7), c = 10.372(3) Angstroem, β = 100.60(3)o, Z = 4.

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