Reactions of TiCl4 with diesters. Crystal structures of and <C2H4(CO2CH2CH2OPh)2Cl4Ti

Article abstract of DOI:10.1016/0022-328X(93)80013-2

Direct reactions of TiCl4 with diethyl malonate in n-hexane or with bis(2-phenoxoethyl) succinate in toluene yield the crystalline compounds (1) and (2), respectively.The crystal structures of both complexes have been determined by a single crystal X-ray diffraction study, and refined by full-matrix least-squares techniques to an R of 0.034 and 0.038 for 1575 and 1490 independent non-zero reflections for 1 and 2, respectively.Crystals of 1 are monoclinic, space group P2₁/c, Z=4, a=7.716(10), b=18.21(2), c=12.384(10) Angstroem, β=127.29(8) deg.Crystals of 2 are triclinic, space group P<*>, Z=2, a=8.680(12), b=10.178(11), c=14.398(15) Angstroem, α=78.45(9), β=74.16(9), γ=88.45(9) deg.The titanium atoms in 1 and 2 are octahedrally-coordinated by four chlorine atoms and two carbonyl oxygen atoms of coordinated diester molecules.The titanium atoms and the chelate ligand atoms form the six-membered ring in 1 and the seven-membered ring in 2.