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Title: Product Diversity in the Reactions of Tp*W(S 2CNEt 2)(CO) 2 with Alkynes: Novel η 2-Alkyne and Tungstathiaenone Complexes
Authors: Lim, P.J.
Slizys, D.A.
White, J.M.
Young, C.G.
Tiekink, E.R.T. 
Issue Date: 24-Nov-2003
Citation: Lim, P.J., Slizys, D.A., White, J.M., Young, C.G., Tiekink, E.R.T. (2003-11-24). Product Diversity in the Reactions of Tp*W(S 2CNEt 2)(CO) 2 with Alkynes: Novel η 2-Alkyne and Tungstathiaenone Complexes. Organometallics 22 (24) : 4853-4860. ScholarBank@NUS Repository.
Abstract: The reactions of Tp*W(S 2CNEt 2)(CO) 2 [Tp* = hydrotris(3,5-dimethylpyrazol-1-yl)borate] with phenylacetylene, 2-butyne-1,4-diol, and dimethyl acetylenedicarboxylate (DMAC) in chlorinated solvents produce Tp*W(S 2CNEt 2-ηS)(η 2-PhC≡CH)(CO) (1), Tp*WCl(η 2-HOCH 2C≡CCH 2OH)(CO) (2), and Tp*W{OCC(CO 2Me)=C(CO 2Me)S -k3O,C,S)}(SCNEt 2-k2C,S) (3), respectively. The complexes have been characterized by microanalysis, IR and 1H and 13C NMR spectroscopy, mass spectrometry, and X-ray diffraction. Complexes 1 and 2 possess octahedral structures with aligned carbonyl and η 2-alkyne ligands (the latter occupying one coordination site) and a tridentate fac-Tp* ligand; the coordination spheres are completed by monodentate dithiocarbamate (W-S(1) 2.397(2) Å, W⋯S(2) 3.999(2) Å) and chloro ligands, respectively. Complex 3 contains a novel heterometallacycle incorporating acyl -k2O,C [≠(CO) 1585 cm -1; δc (C=O) 269.2, 1J cw 18 Hz] and enethiolate units, a thiocarboxamido ligand [≠(CN) 1525 cm -1; δc 250.3, 1J cw 81 Hz], and a tridentate fac-Tp* ligand. The complex exhibits an octahedral structure with planar, orthogonal acyl-enethiolate and thiocarboxamide ligands (the acyl and thiocarboxamide units each occupy one coordination site).
Source Title: Organometallics
ISSN: 02767333
DOI: 10.1021/om030416w
Appears in Collections:Staff Publications

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