An organometallic approach to the synthesis of high nuclearity Mo-Fe-S clusters as potential models for the iron-molybdenum cofactor of nitrogenase

Syntheses and Characterization of γ-[SiW10M2S2O38]6- (M = MoV, WV). Two Keggin Oxothio Heteropolyanions with a Metal−Metal Bond

“…Relevance of metal−sulfur compounds to bioinorganic chemistry and catalysis has provoked extensive study of the syntheses and characterizations of molybdenum and tungsten containing compounds in sulfur environments …”

Synthesis of a sulfido-capped triiron cluster with bridging phosphido ligands and its reactions with alkynes, phosphites and phosphines †

“…3 and selected bond distances and angles are listed in Table 3. The structure is essentially the same as that for complex 1 with a sulfur atom capping the triiron base and the three metal-metal edges bridged by phosphido [Fe(1)-Fe(3), Fe(2)-Fe(3)] and carbonyl groups [Fe(1)-Fe (2)]. The structure differs from that in 1 in that a pseudo-equatorial terminal carbonyl group on one of the iron atoms that is attached to both a bridging phosphido and a bridging carbonyl group is replaced by a PPhMe 2 ligand.…”

“…Interest in multinuclear transition metal complexes incorporating sulfur atoms has been widespread for a variety of reasons including the range of structural types, 1 their connection with biological processes 2 and their relevance to the hydrodesulfurisation process. 3 In addition a number of complexes of the type M 3 (µ 3 -S) (M = transition metal) have been used as efficient catalysts in the cyclotrimerisation of terminal alkynes to give benzene derivatives.…”

Bis(acetonitrile-κN)bis[hydridotris(3,5-dimethylpyrazol-1-yl-κN2)borato]di-μ3-sulfido-tetra-μ2-sulfido-di-μ2-thiocyanato-κ2N:S;κ2S:N-tetracopper(I)ditungsten(VI)

“…In recent years, the chemistry of the Mo/W/Cu/S clusters derived from reactions of metal sulfide synthons {e.g. [MS 4 ] 2À (M = Mo, W) (Mü ller et al, 1981(Mü ller et al, , 1989Howard et al, 1986;Holm et al, 1995;Ansari et al, 1990;Hou et al, 1996;Wu et al, 2004;Niu et al, 2004;Zhang, Song & Wang, 2007); [Cp*MS 3 ] À (Cp* is pentamethylcyclopentadienyl; M = Mo, W) (Kawaguchi et al, 1995(Kawaguchi et al, , 1997Lang, Kawaguchi, Ohnishi et al, 1997;Lang et al, 1998Lang et al, , 1999Lang et al, , 2003Xu et al, 2006;Zhang, Song, Ren et al, 2007); [Tp*MS 3 ] À [Tp* is hydridotris(3,5-dimethylpyrazol-1-yl)borate; M = Mo, W] (Seino et al, 2001(Seino et al, , 2003Wang et al, 2007;Wei et al, 2009)} with CuX (X = Cl, Br, I, SCN, CN) has been extensively investigated because of their structural variety, their potential applications in biological systems (Chan et al, 1995;Che et al, 2001;Eldredge et al, 1990;Stiefel et al, 1993Stiefel et al, , 1996George et al, 2000George et al, , 2003Dobbek et al, 2002;Ginda et al, 2003) and as opto-electronic materials (Shi et al, 1994(Shi et al, , 1998Zheng et al, 1997;Zhang et al, 2000;Che et al, 2001;Coe et al, 2004). Currently we are interested in using (Et 4 N)[Tp*WS 3 ]…”