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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/11858

Title: Synthesis, structure and mechanism of formation of chalcogen-stabilised mixed-metal clusters featuring acetylide bridging and acetylide coupling
Authors: MATHUR, P
AHMED, MO
KALDIS, JH
MCGLINCHEY, MJ
Keywords: m = mo
crystal-structures
heterometallic clusters
molecular-structure
carbonyl clusters
te
ligands
se
bonds
co
Issue Date: 2002
Publisher: ROYAL SOC CHEMISTRY
Citation: JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, (4), 619-629
Abstract: Mild thermolysis of a toluene solution of [(eta(5)-C5H5)Mo(CO)(3)(C=CPh)] and [Fe-3(CO)(9)(mu(3)-E)(2)] (E = S, Se) resulted in the formation of mixed-metal clusters, [(eta(5)-C5H5)(2)Mo2Fe3(CO)(8)(mu(3)-E)(2){eta(5)-CC(Ph)CC(Ph)}] (E = S, 1; Se, 2), [(eta(5)-C5H5)(2)Mo2Fe4(CO)(9)(mu(3)-E)(2)(mu(4)-CCPh)(2)] (E = S, 3; Se, 4) and [(eta(5)-C5H5)(2)Mo2Fe3(CO)(7)(mu(3)-E)(2){mu(5)-CC(Ph)C(Ph)C}] (E = S 5; E = Se 6) which feature head-to-tail coupling of two acetylide groups, two acetylide groups which remain uncoupled and a tail-to-tail coupling of two acetylide groups, respectively, on the chalcogen-bridged Fe/Mo cluster framework. Under similar conditions, the reaction of [(eta(5)-C5H5)W(CO)(3)(C=CPh)] and [Fe-3(CO)(9)(mu(3)-E)(2)] formed the clusters [(eta(5)-C5H5)(2)W2Fe3(CO)(7)(mu(3)-E)(2)(mu(3)-eta(2)-CCPh)(mu(3)-eta(1)-CCH2Ph)] (E = S, 7 or Se, 8) and [(eta(5)-C5H5)WFe2(CO)(8)(mu-CCPh)] (9). All compounds have been characterised by IR and H-1 and C-13 NMR spectroscopy. The Se-bridged compounds have been further characterised by Se-77 NMR spectroscopy. The crystal structures of 1, 3 and 5-9 were elucidated by X-ray diffraction methods.
URI: http://dx.doi.org/10.1039/b107090h
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11858
http://hdl.handle.net/10054/11858
ISSN: 1472-7773
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