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DOI: 10.1039/A606324A (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 991-994

Alkyne-based derivatives of [Ru6C(CO)17] and the stepwise synthesis of [Ru6C(CO)13(η5-C5H 3Ph2)(µ3-CPh)]

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Alexander J. Blake, Jane L. Haggitt, Brian F. G. Johnson and Simon Parsons

Abstract

A systematic synthetic route to the hexanuclear cluster compound [Ru6C(CO)13(η5-C5H 3Ph2)(µ3-CPh)] has been elaborated in which a number of stable intermediates have been isolated and characterised. The reaction of [Ru6C(CO)17] with Me3NO and phenylacetylene afforded the alkyne derivative [Ru6C(CO)15(PhC2H)] 1. Further treatment of 1 with Me3NO and an excess of phenylacetylene resulted in the formation of two isomers [Ru6C(CO)14{C(Ph)CHC(Ph)CH}] 2 and [Ru6C(CO)14{C(Ph)CHCHC(Ph)}] 3. Both contain five-membered metallocyclic rings formed by the head-to-head coupling of phenylacetylene in one isomer and the head-to-tail coupling in the other. Reaction of isomer 2 with Me3NO and phenylacetylene leads to [Ru6C(CO)13(η5-C5H 3Ph2)(µ3-CPh)] 4. The molecular structure of one of the isomers, 3, has been established by single-crystal X-ray crystallography.

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