Syntheses and structures of transition metal thiolate complexes containing the new bis(tetramethylguanidine) ligand btmgp
作者:Siegfried Pohl、Michael Harmjanz、Jörg Schneider、Wolfgang Saak、Gerald Henkel
DOI:10.1016/s0020-1693(00)00310-8
日期:2000.12
Phe syntheses. spectroscopic and structural characterizations of the first iron and copper thiolate guanidine complexes are described. Reactions of the neutral complexes [Cu[(btmgp)] and [FeI2(btmgp)] [btmgp = 1,3-bis(N,N,N',N'-tetramethyl-guanidino)propane] with different uni- and bi-dentate thiolate ions yield the three-coordinate complex [Cu(S-2,4,6-(Bu3C6H2)-Bu-1)(btmgp)] (1) and the four-coordinate complexes [Fe(S-2,4,6-(Pr3C6H2)-Pr-1)(2)(btmgp)] (2) and [Fe(SiMe2(C6H4S)(2))(btmgp)] (3) respectively. Starting with [Fe(N(SiMe3)(2))(2)], btmgp and the dithiol SiMe2(C6H4SH)(2), an alternative procedure for the preparation of 3 is reported, demonstrating a useful synthetic approach towards neutral, N S mixed coordinated Fe(II) complexes. The X-ray structure analyses of 1 - 3 reveal trigonal planar (2N 1S) (1) and tetrahedral (2N 2S) (2, 3) coordination environments around the metal centers. (C) 2000 Elsevier Science B.V. All rights reserved.