A series of thioheterobimetallic anions have been synthesized: [S2WS2Fe(NCS)X](2-) (X = Cl- (1); X = NCS- (2); X = N-3(-) (3)). The molecular dianions were isolated by substitution in [S2WS2FeCl2](2-) of the labile terminal chloro ligands by NCS- and/or N-3(-). Anions (1) and (3) are the first iron tris-heteroleptic complexes of the well-known [S2WS2FeX2](2-) (M = Mo, W) family. The structures of the three molecular anions, isolated as tetraphenylphosphonium salts, are reported, as well as characterization by IR, electronic and electrospray mass spectroscopies. (C) 2004 Elsevier B.V. All rights reserved.
Synthesis and structural characterization of the (Ph4P)2[Cl2FeS2MS2FeCl2] complexes (M = molybdenum, tungsten). First example of a doubly bridging thiomolybdate (MoS4) unit and its possible relevance as a structural feature in the nitrogenase active site
作者:D. Coucouvanis、N. C. Baenziger、E. D. Simhon、P. Stremple、D. Swenson、A. Simopoulos、A. Kostikas、V. Petrouleas、V. Papaefthymiou