Facial and meridional [NCN]− intramolecular coordination systems: structure of fac-PtBrMe2{2,6-(pzCH2)2C6H3}·1/2C6H6 {[2,6-(pzCH2)2C6H3]−=2,6-(bis{(pyrazol-1-yl)methyl}phenyl)} and mer-PtBr{2,6-(3,5-Me2pzCH2)2C6H3}, and an alternative synthetic route to the platinum(II) [NCN]− kernel
作者:Allan J. Canty、Jim Patel、Brian W. Skelton、Allan H. White
DOI:10.1016/s0022-328x(99)00763-9
日期:2000.4
Intramolecular coordination by the six-membered monoanionic N,C,N chelating system 2,6-(pyrazol-1-ylmethyl)phenyl and substituted derivatives can give rise to facial and meridional coordination, exhibited by structural studies of facial. coordination in the platinum(IV) complex PtBrMe22,6-(pzCH(2))(2)C6H3}. 1/2C(6)H(6) and meridional coordination in the platinum(II) complex PtBr2,6-(3,5-Me(2)pzCH(2))(2)C6H3} showing close to 'ideal' geometry for the [N-C-N](-) donor sets. A platinum(IV) complex is formed by oxidative addition of 2,6-(3,5-Me(2)pzCH(2))(2)C6H3Br to [PtMe2(SEt2)](2), but reaction with [Pt(p-Tol)(2)(SEt2)](2) gives the platinum(II) complex PtBr2,6-(3,5-Me(2)pzCH(2))(2)C6H3} and 4,4'-bitolyl. (C) 2000 Elsevier Science S.A. All rights reserved.