Mixed metal PtxMyLz complexes of L = 1-methyluracil and 1-methylthymine: Preparation and spectroscopic studies |
| |
| Authors: | David ML Goodgame Robert W Rollins Bernhard Lippert |
| |
| Institution: | Chemistry Department, Imperial College of Science and Technology, London SW7 2AY, U.K.;Anorganisch-Chemisches Institut, Technische Universität München, Lichtenbergstrasse 4, D-8046 Garching, F.R.G. |
| |
| Abstract: | The reactions of cis-(NH3)2PtL2 (L = 1-MeT or 1-MeU, the anions of 1-methylthymine or 1-methyluracil respectively) in water with various salts of Fe(II), Fe(III), Co(II), Ni(II), Cu(II) or Ag(I) have produced 14 new heteronuclear complexes of the general types: cis-(NH3)2PtL2ML2Pt(NH3)2]Xn·mH2O or cis-(NH3)2PtL2MXn·mH2O, and also with silver(I) perchlorate a complex of stoichiometry cis-{(NH3)2Pt(1-MeU)2}2· 3AgClO4·6H2O. Comparisons are made with previously reported heteronuclear species derived from cis-(NH3)2PtL2 and factors influencing the type of heteronuclear complex formed are discussed, particularly the versatility of binding patterns with Ag(I). A tetranuclear structure is suggested for the compound of stoichiometry cis-(NH3)2Pt(1-MeU)2·FeSO4·3H2O involving iron(II) ions linked by sulphate bridges. The electronic spectra of the trinuclear complexes cis-(NH3)2Pt(1-MeU)2M(1-MeU)2Pt(NH3)2] (NO3)2·mH2O (M = Fe, Co or Ni) are reported. They show that the trans-MO4Pt2 geometry results in a very severely trans-elongated ligand field about the central metal ion, M. This conclusion is supported by the Mössbauer spectrum in the case of the iron(II) complex. The X- and Q-band EPR spectra of the Fe(III) analogue are also reported. |
| |
| Keywords: | Author to whom correspondence should be addressed |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
