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Linking metal centres with 1,4-bis(diphenylphosphino)but-2-yne (DPPBu): Syntheses and molecular structures of [{Mo(CO)(4)(mu-DPPBu)}(2)] and [{Mo(CO)(4)(eta(2)-DPPBu)}(3){Mo(CO)}]

Hogarth, G; Pang, JY; (1996) Linking metal centres with 1,4-bis(diphenylphosphino)but-2-yne (DPPBu): Syntheses and molecular structures of [{Mo(CO)(4)(mu-DPPBu)}(2)] and [{Mo(CO)(4)(eta(2)-DPPBu)}(3){Mo(CO)}]. J ORGANOMET CHEM , 515 (1-2) 193 - 203.

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Abstract

Addition of cis-[Mo(CO)(4)(piperidine)] to 1,4-bis(diphenylphosphino)but-2-yne (DPPBu) affords [{Mo(CO)(4)(mu-DPPBu)}(2)] (1) and [{Mo(Co)(4)(eta(2)-DPPBu)}(3){Mo(CO)}] (2), both of which have been characterised crystallographically. Three different bonding modes of the diphosphine are seen in the two complexes. In 1 it bridges molybdenum tetracarbonyl centres via coordination through phosphorus to give a 14-membered ring with a chair-like configuration, while in 2 the diphosphine chelates molybdenum tetracarbonyl centres, and three of these units are further complexed to a molybdenum carbonyl fragment via coordination of the carbon-carbon triple bonds.

Type:Article
Title:Linking metal centres with 1,4-bis(diphenylphosphino)but-2-yne (DPPBu): Syntheses and molecular structures of [{Mo(CO)(4)(mu-DPPBu)}(2)] and [{Mo(CO)(4)(eta(2)-DPPBu)}(3){Mo(CO)}]
Keywords:diphosphine, molybdenum, alkyne, crystal structure, chelation, fluxionality, bridging ligand, COMPLEXES, LIGAND
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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