Issue 5, 1995
From the journal:

Journal of the Chemical Society, Dalton Transactions

Synthesis and characterisation of enynyl, vinyl and acetylide complexes of osmium(II)

Gabriele Albertin,   Stefano Antoniutti  and  Emilio Bordignon  

Abstract

Treatment of [OsH2L4][L = P(OEt)3 or PPh(OEt)2] first with CF3SO3Me and then with an excess of terminal alkynes RC[triple bond, length half m-dash]CH (R = But, Ph or p-MeC6H4) produced enynyl derivatives [Os{η3-RC3C(H)R}L4]+1–3. Sequential reactions of [OsH2L4] with CF3SO3Me and activated alkynes R′O2CC[triple bond, length half m-dash]CH (R′= Me or Et) or MeO2CC[triple bond, length half m-dash]CCO2Me yielded alkenyl [Os{CH[double bond, length half m-dash]C(H)CO2R′}L4]+4, 5 and [Os{C(CO2Me)[double bond, length half m-dash]C(H)CO2-Me}L4]+6 cations, respectively. Spectroscopic data (IR, 1H, 31P, 13C NMR) suggest, in the case of L = P(OEt)3, the presence of two isomers for the alkenyls 4 and 5, with five- and four-membered chelate rings of the vinyl ligand. Hydride–alkynyl [OsH(C[triple bond, length half m-dash]CPh)L4] complexes were also obtained by treating [OsH2L4] with CF3SO3Me followed by treatment with lithium phenylacetylide.

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Article information

DOI
https://doi.org/10.1039/DT9950000719
Article type
Paper

J. Chem. Soc., Dalton Trans., 1995, 719-725

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Synthesis and characterisation of enynyl, vinyl and acetylide complexes of osmium(II)

G. Albertin, S. Antoniutti and E. Bordignon, J. Chem. Soc., Dalton Trans., 1995, 719 DOI: 10.1039/DT9950000719

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