The crystal structure and properties of [TiCl 4{CH(CO 2Et) 3}] and [Al 2Cl 6{μ-C 2H 4(CO 2Et) 2}

Abstract

The reactions of TiCl 4 with CH(CO 2Et) 3) and AlCl 3 with C 2H 4(CO 2Et) 2 in CH 2Cl 2 gave [TiCl 4{CH(CO 2Et) 3}] ( 1) and Al 2Cl 6{μ-C 2H 4(CO 2Et) 2}] ( 2) respectively. The crystal structures of 1 and 2 have been determined by a single crystal X-ray diffraction studies and refined by full-matrix least squares techniques to R 1 = 0.0272 and 0.0282 (for 2654 and 1274 unique non-zero reflections) for 1 and 2 respectively. The crystals of 1 belong to the space group C2/ c with Z = 8 and a = 17.131(8), b = 10.715(3), c = 18.512(5) A ̊ and β = 92.97(3)°. The titanium atom in 1 is octahedrally coordinated by four terminal chlorine atoms and two oxygen atoms in cis position from the coordinated triester molecule. Crystals of 2 are monoclinic, space group P2 1/c, Z = 4, a = 14.109(2), b = 10.049(2), c = 15.644(3) A ̊ and β = 116.65(2)°. In the molecular dimeric compound, each aluminium atom is tetrahedrally coordinated by three terminal chlorine atoms and one oxygen atom from the bridging diethyl succinate molecule.