The interaction of the titanium(II) complex trans-TiCl2(dmpe)2 with 2 equivalents of Na(C5H5) or Na(C5H4Me) in diethyl ether gives the dark orange cyclopentadienyl compounds Ti(C5H4R)2(dmpe) (R = H or Me, dmpe = Me2PCH2CH2PMe2). These diamagnetic 18-electron species give n.m.r. spectra consistent with a bent metallocene structure, confirmed by the X-ray structure analysis of Ti(C5H4Me)2(dmpe) for which Ti-P 2.533(6) Å (mean), Ti-C 2.310(5)-2.441 (6) Å, P-Ti-P 76.9(2)°, and centroid-Ti-centroid = 135.3(2)°. The cyclopentadienyl rings are very slightly tilted towards the dmpe ligand due to non-bonding contacts between the ring-bound methyl groups.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of the Chemical Society, Dalton Transactions|
|State||Published - 1984|
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