Debojit Chakrabarty

Mixed chalcogen carbonyl compounds: IV.Reactivity of Fe2(CO)6(μ-STe) and Fe3(CO)9(μ3-S) (μ3-Te) towards coordinatively unsaturated species☆

Abstract Using Fe 2 (CO) 6 (μ-STe) and Fe 3 (CO) 9 (μ 3 -S)(μ 3 -Te) for the addition of coordinatively unsaturated species, the following new mixed metal, mixed chalcogen compounds have been obtained: Fe 2 (CO) 6 (μ 3 -S)(μ 3 -Te)M(PPh 3 ) 2 (M = Pt, Pd), Fe 2 Ru(CO) 9 (μ 3 -S)(μ 3 -Te) and Fe 4- x Ru x (CO) 11 (μ 4 -S)(μ 4 -Te) ( x = 0–2). The formation of the triphenylphosphine derivatives, Fe 3 (CO) 9 − x (PPh 3 ) x (μ 3 -S)(μ 3 -Te) ( x = 1,2) and Fe 3 (CO) 9 (PPh 3 )(μ 3 -S)(μ 3 -Te) are also reported.

Mixed chalcogen carbonyl compounds: synthesis and characterisation of (CO)6Fe2(μ3-Se)(μ3-Te)Pt(PPh3)2 Fe3(CO)7(PPh3)2(μ3-Se)(μ3-Te)

Abstract An improved method for isolation of pure Fe3(CO)9(μ3-Se)(μ3-Te) and Fe2(CO)6(μ-SeTe) has been developed. The mixed chalcogenide complex (CO)6Fe2(μ3-Se)(μ3-Te)Pt(PPh3)2 is formed exclusively on treatment of Fe2(CO)6(μ3-Se)(μ3-Te) with Pt(C2H4)(PPh3)2, or along with Fe3(PPh3)2(μ3-Se)(μ3-Te) when Fe3(CO)9(μ3-Se)(μ3-Te) is treated with Pt(PPh3)4. With PPh3, Fe3(CO)9(μ3-Se)(μ3-Te) forms an adduct, (CO)6Fe2(μ3-Se)(μ3-Te)Fe(CO)3(PPh3).

Mixed chalcogen carbonyl compounds: III. Construction of the new unsaturated mixed metal clusters Fe2Ru2(CO)10(μ-CO)(μ4-Se)(μ4-Te) and Fe3Ru(CO)10(μ-CO)(μ4-Te)☆

Abstract Addition of Ru(CO) 4 (C 2 H 4 )to Fe 2 Ru(CO) 9 (μ 3 -Se)(μ 3 -Te) and Fe 3 (CO) 9 (μ 3 -Se)(μ 3 -Te) lead to a clean formation of the new unsaturated mixed metal, mixed chalcogen carbonyl clusters, Fe 2 Ru 2 (CO) 10 (μ-CO)(μ 4 -Se)(μ 4 -Te) and Fe 3 Ru(CO) 10 (μ-CO)(μ 4 -Se)(μ 4 -Te) respectively. The Fe 3 Ru cluster is also obtainable from the photolysis of a solution containing Fe 2 Ru(CO) 9 (μ 3 -Se)(μ 3 -Te) and Fe(CO) 5 .

Mixed chalcogen carbonyl compounds: II. Synthesis and characterization of Fe2Ru(μ3-Se)(μ3-Te)(CO)9 and (μ5-C5H5)CoFe2(μ3-Se)(μ3-Te)(CO)6

The new mixed metal complexes, each containing bridging selenium and tellurium ligands in the same molecule, Fe 2 Ru(CO) 9 (μ 3 -Se)(μ 3 -Te) and (η 5 -C 5 H 5 )CoFe 2 (CO) 6 (μ 3 -Se)(μ 3 -Te) have been prepared from the room temperature reactions of Fe 2 (CO) 6 (μ-SeTe) with Ru(CO) 4 (C 2 H 4 ) and (C 5 H 5 )Co(CO) 2 , respectively. Reaction of (η 5 -C 5 H 5 )CoFe 2 (CO) 6 (μ 3 -Se)(μ 3 -Te) with Pt(PPh 3 ) 4 forms the previously known (CO) 6 Fe 2 (μ 3 -Se)(μ 3 -Te)Pt(PPh 3 ) 2 and on treatment with NaOMe, followed by acidification, Fe 2 (CO) 6 (μ-SeTe) is formed.

Synthesis and characterisation of [HOs3(CO)10-(μ-TeC6H4OMe)] and its conversion into [Os3Te2(CO)9]

The synthesis of [HOs3(CO)10(μ-TeC6H4OMe)] by the room temperature reaction of [HOs3(CO)11][PPN] with {(OMe)C6H4}2TeCl2, and its conversion into [Os3Te2(CO)9] under thermolysis are described.

Mixed chalcogen carbonyl compounds

The new mixed metal complexes, each containing bridging selenium and tellurium ligands in the same molecule, Fe 2 Ru(CO) 9 (μ 3 -Se)(μ 3 -Te) and (η 5 -C 5 H 5 )CoFe 2 (CO) 6 (μ 3 -Se)(μ 3 -Te) have been prepared from the room temperature reactions of Fe 2 (CO) 6 (μ-SeTe) with Ru(CO) 4 (C 2 H 4 ) and (C 5 H 5 )Co(CO) 2 , respectively. Reaction of (η 5 -C 5 H 5 )CoFe 2 (CO) 6 (μ 3 -Se)(μ 3 -Te) with Pt(PPh 3 ) 4 forms the previously known (CO) 6 Fe 2 (μ 3 -Se)(μ 3 -Te)Pt(PPh 3 ) 2 and on treatment with NaOMe, followed by acidification, Fe 2 (CO) 6 (μ-SeTe) is formed.