Synthesis and characterization of Ti(C5H5)(2,4-C7H11) and Ti(2,4-C7H11)2[, chiral phosphite adducts of an open and a half open titanocene
作者:Derk Vos、Atta M. Arif、Richard D. Ernst
DOI:10.1016/s0022-328x(97)00610-4
日期:1998.2
The chiral phosphite derived from S-1,2,4-butanetriol has been found to bind both half-open and open titanocene moieties (Ti(C5H5)(2,4-C7H11) and Ti(2,4-C7H11)(2), C7H11 = dimethylpentadienyl) strongly. The expected reduction in symmetry upon coordination was evidenced through H-1 and C-13 NMR spectroscopies. Although the compounds were found to be thermally unstable, presumably as a result of the presence of a strained five-membered ring, an X-ray diffraction study of the latter complex could be achieved at low temperatures. Two nonequivalent conformations were observed in the solid state. (C) 1998 Elsevier Science S.A.