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Closed Access item Preparation, X-ray structures, and NMR spectra of elongated dihydrogen complexes with four- and five-coordinate tin centers

Authors:Eguillor, Beatriz
Esteruelas, Miguel A.
Oliván, Montserrat
Issue Date:Aug-2006
Publisher:American Chemical Society
Citation:Organometallics 25(19): 4691-4694 (2006)
Abstract:Complex OsH3(SnPh2Cl){[è2-CH2dC(CH3)]PiPr2}(Pi- Pr3) (1) undergoes protonation-addition of benzoic acid to giVe the elongated dihydrogen deriVatiVe Os(SnPh2Cl)( 2-O2CPh)- (è2-H2)(PiPr3)2 (2). In solution the tin atom exchanges with the osmium on the chloride ligand by one of the oxygen atoms of the carboxylate group to afford OsCl{OC(Ph)OSnPh2}(è2- H2)(PiPr3)2 (3). Treatment of the latter with 1.0 equiV of benzoic acid leads to OsCl{OC(Ph)OSn( 2-O2CPh)Ph}(è2-H2)(PiPr3)2 (4). The elongated dihydrogen ligands of 2 and 3 show blocked rotation on the NMR time scale, whereas the hydrogen atoms undergo quantum exchange coupling. The X-ray structures of 3 and 4 are also reported.
Description:4 pages, 4 figures, 1 scheme.-- Supporting Information Available: http://pubs.acs.org.
Publisher version (URL):http://dx.doi.org/10.1021/om060395g
Appears in Collections:(ICMA) Artículos

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