Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 8, 1986
Previous Article Next Article

Evidence for carbon–hydrogen–titanium interactions: synthesis and crystal structures of the agostic alkyls [TiCl3(Me2PCH2CH2PMe2)R](R = Et or Me)

Abstract

The compounds [TiCl3(dmpe)R](R = Me, CH2D, or Et; dmpe = Me2PCH2CH2PMe2) have been prepared. An X-ray crystal structure determination of [TiCl3(dmpe)Et] shows that the Ti–C–C angle of the Ti–Et moiety is 86.3(6)°. Variable-temperature n.m.r. studies show the molecule to be fluxional at room temperature. At –90 °C the n.m.r. spectra correspond to the structure found in the crystal and J(C–H) for the ethyl CH2 hydrogens is 150.2 Hz. It is concluded that the ethyl group is bonded by a [graphic omitted] system. The crystal structure of [TiCl3(dmpe)Me] has been determined from X-ray and neutron diffraction data. The data show the methyl group to be distorted such that it is tilted with respect to the Ti–C vector and one hydrogen atom closely approaches the Ti centre giving an angle for Ti–C–H of 93.5(2)°(neutron data). Variabletemperature n.m.r. studies show that [TiCl3(dmpe)R](R = CH3 or CH2D) are fluxional but provide no evidence for differentiation of the C–H moiety of the methyl group.

Back to tab navigation

Article information


J. Chem. Soc., Dalton Trans., 1986, 1629-1637
Article type
Paper

Evidence for carbon–hydrogen–titanium interactions: synthesis and crystal structures of the agostic alkyls [TiCl3(Me2PCH2CH2PMe2)R](R = Et or Me)

Z. Dawoodi, M. L. H. Green, V. S. B. Mtetwa, K. Prout, A. J. Schultz, J. M. Williams and T. F. Koetzle, J. Chem. Soc., Dalton Trans., 1986, 1629
DOI: 10.1039/DT9860001629

Search articles by author

Spotlight

Advertisements