Reaction of the hexa-1,3,5-triyne Me3SiC CC CC CSiMe3 with Ru-4(CO)(13)(mu(3)-PPh): Parallels with the chemistry of alkynes and diynes

PJ Low, KA Udachin, AJ Carty

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Reaction of Ru-4(CO)(13)(mu(3)-PPh) (1) with the 1,3,5-hexatriyne Me(3)SiCequivalent toCCequivalent toCCequivalent toCSiMe(3) under mild thermal conditions affords initially Ru-4(CO)(10)(mu-CO)(2){mu(4)-eta(1),eta(1),eta(2)-P(Ph)C(Cequivalent toCSiMe(3))C(Cequivalent toCSiMe(3)) (2), via the facile formation of a P-C bond in a manner similar to that demonstrated previously with alkynes and diynes. The 62-CVE cluster 2 readily decarbonylates to give crystallographically characterised Ru-4(CO)(10)(mu-CO)(mu(4)-PPh){mu(4)-eta(1),eta(1),eta(2),eta(2)-Me(3)SiCequivalent toCC(2)Cequivalent toCSiMe(3)} (3). Attempts to further incorporate the pendant alkyne moieties in 3 into the Ru-4 coordination environment were partially successful with Ru-4(CO)(10)(mu(4)-PPh)(mu(4)-eta(1),eta(1),eta(3),eta(3)-RC4R') (4, R/R' SiMe3/Cequivalent toCSiMe(3)) being formed as a minor product together with the unusual toluene coordinated species Ru-4(CO)(7)(eta(6)-C6H5Me)(mu(4)-PPh)(mu(4)-eta(1),eta(1),eta3,eta(3)-Me(3)SiC(4)Cequivalent toCSiMe(4)) (5). Cluster 3 reacts with an excess of Me(3)SiCequivalent toCCequivalent toCCequivalent toCSiMe(3) to give the open chain cluster Ru-4(CO)(9)(mu(3)-PPh){mu(4)-eta(2),eta(2),eta(4),eta(4),-C-4(Cequivalent toCSiMe(3))(SiMe3)C-4(Cequivalent toCSiMe(3))(3)} (6).

Original languageEnglish
Pages (from-to)277-289
Number of pages13
JournalJournal of Cluster Science
Issue number3
Publication statusPublished - Sep 2004
Externally publishedYes

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