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Reactions of [Os-3(CO)(10)(NCMe)(2)] with symmetric diynes and their reactivity towards [Co-2(CO)(8)]


Reference:

Amoroso, A. J., Clarke, L. P., Davies, J. E., Lewis, J., Powell, H. R., Raithby, P. R. and Shields, G. P., 2001. Reactions of [Os-3(CO)(10)(NCMe)(2)] with symmetric diynes and their reactivity towards [Co-2(CO)(8)]. Journal of Organometallic Chemistry, 635 (1-2), pp. 119-131.

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Abstract

The reaction between [Os-3(CO)(10)(NCMe)(2)] and MeC2C2Me yields the known cluster [Os-3(CO)(9)(mu -CO)(mu (3)-eta (2)-MeC2C2Me)] (1) [Os-3(CO)(9){mu (3)-eta (2):mu (3)-eta (1):eta (3)-MeC2C2MeOC5Me2)Os-3(mu -Co)(CO)(9)] (2), [Os-3(CO)(9){mu (3)-and three previously uncharacterised products [Os-3(CO)(9)(mu -CO){mu (3)-eta (2):mu (3)-eta (1):)(CO)(9)] (2), [Os-3(CO)(9){mu (3)-eta [(MeC2)C-2(Me)]CO[(Me)C-2(C2Me)], MeC2)C-2(Me)]CO[(MeC2)C-2(Me)]}] (4). The structures of 2 and 3 have been determined by X-ray crystallography. Cluster 2 incorporates two linked triosmium clusters joined by an unsaturated five-membered metallacycloether ring and 3 exhibits an alkyne-functionalised metallacyclohexadieneone ring. 1-4 and [Os-3(CO)(9)(mu -CO)(mu (3)-eta (2)-PhC2C2Ph)] (5) react with [Co-2(CO)(8)] to form products 6-11 in which one free alkyne function coordinates to a Co-2(CO)(6) unit in each case; the Cluster [{Os-3(CO)(10)}{Co-2(CO)(6)}{mu (3)-eta (2)-parallel to-(MeCC)(mu (2)-eta (2)(CCMe)}] (6) has been structurally characterised. The reaction of 1 and 5 with Me3NO-MeCN leads to the replacement of one CO ligand with MeCN, the products 12 and 13 reacting with H2O to form [Os-3(CO)(9)(mu -OH)(mu (3)-eta (1):eta (2)-eta (2)-RC3CHR)] (R = Me (two isomers 14, 15), Ph (16)); the X-ray structure of 16 is reported. Reaction of 3 with Me3NO-MeCN results in the substitution of a CO ligand with either a MeCN or NMe3 ligand at the metallocyclic Os atom to afford the clusters [Os-3(CO)(8)(L)(mu (3)-eta (1):eta (1):eta (2):eta (2)- {(MeC2)C-2(Me)}(2)CO)] (L = NCMe (17), NMe3 (18)). (C) 2001 Elsevier Science B.V. All rights reserved.

Details

Item Type Articles
CreatorsAmoroso, A. J., Clarke, L. P., Davies, J. E., Lewis, J., Powell, H. R., Raithby, P. R. and Shields, G. P.
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code5254
Additional InformationID number: ISI:000171820700011

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