(μ-dithio)bis(tricarbonyliron) as an organic disulfide mimic: insertion of low-valent metal species into the sulfursulfur bond

Synthesis, structure and formation pathways of new Fe–S complexes containing [Fe2S2]-units in different valences, [Fe2S2(CO)4(PPh3)2], [Fe3S2(CO)6(PPh3)3] and [Fe4S2(CO)10]2− and the origin of the [Fe2S2]-unit in metal–[Fe2S2(CO)6] complexes

“…There are two terminal carbonyls and a PPh 3 -ligand connecting to each iron atom of the core forming the iron atoms in seven coordination for Fe(1) and six coordination for Fe (2) and Fe (3) if considering the Fe-Fe bonding. It is worth pointing out that the two PPh 3 ligands on the Fe atoms of the base in complex 2 adopted equatorial-axial coordination mode which was the same as that observed in [Fe 3 [1,2] in complex 2.…”

“…CuCl and AgNO 3 were products of Shanghai Chemical Company. [Fe 2 S 2 (CO) 6 ] were prepared by reaction of Fe(CO) 5 with Na 2 S 5 and KOH in MeOH [1,2].…”

“…The chemistry of [Fe 2 S 2 (CO) 6 ] has greatly interested chemists and bio-inorganic chemists because the reaction with participation of [Fe 2 S 2 (CO) 6 ] or [Fe 2 S 2 (CO) 6 ] 2À results in a variety of mixed-metal and mixed valence cluster complexes containing different [Fe 2 S 2 ]-units which are very useful for investigation on the active center in metal enzymes and synthesis of novel poly-nuclear metal cluster compounds which possess novel structural conformation and significant physical and chemical properties [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Reactions of elemental sulfur with tetrakis(triphenylphosphine)platinum(0). Formation of a complex containing very nucleophilic bridging sulfido ligands

“…In this spin system the appearance of the "'Pt satellites as pseudo triplets can be explained by invoking a coupling J4(P-P, trans) -20 Hz whilst J4 (P-P, cis) is too small to be ob- metals (10,11). This compound may form in the reaction but Ginsberg's work (10) suggests that it would be consumed rapidly as in reaction [3].…”

“…Conductivity measurements were made in nitroundergo addition reactions with alkynes (I), isonitriles (21, methane at 2s0C using a Beckman Model RC-18A conductivity transition metals (3), and alkyl halides (3). Even dihydrogen bridge.…”