Syntheses and structures of transition metal thiolate complexes containingthe neu bis(tetramethylguanidine) ligand btmgp

Phe syntheses. spectroscopic and structural characterizations of the first iron and copper thiolate guanidine complexes are described. Reactions of th e neutral complexes [Cu[(btmgp)] and [FeI2(btmgp)] [btmgp = 1,3-bis(N,N,N', N'-tetramethyl-guanidino)propane] with different uni- and bi-dentate thiola te ions yield the three-coordinate complex [Cu(S-2,4,6-(Bu3C6H2)-Bu-1)(btmg p)] (1) and the four-coordinate complexes [Fe(S-2,4,6-(Pr3C6H2)-Pr-1)(2)(bt mgp)] (2) and [Fe(SiMe2(C6H4S)(2))(btmgp)] (3) respectively. Starting with [Fe(N(SiMe3)(2))(2)], btmgp and the dithiol SiMe2(C6H4SH)(2), an alternativ e procedure for the preparation of 3 is reported, demonstrating a useful sy nthetic approach towards neutral, N S mixed coordinated Fe(II) complexes. T he X-ray structure analyses of 1 - 3 reveal trigonal planar (2N 1S) (1) and tetrahedral (2N 2S) (2, 3) coordination environments around the metal cent ers. (C) 2000 Elsevier Science B.V. All rights reserved.