Synthesis and X-ray crystal structure of the TiMgCl5OH(CH3COOC2H5)4 adduct
1988; Elsevier BV; Volume: 147; Issue: 2 Linguagem: Inglês
10.1016/s0020-1693(00)83365-4
ISSN1873-3255
AutoresG. Giunchi, Enrico Albizzati, L. Malpezzi, Enzo Giannetti,
Tópico(s)Organometallic Complex Synthesis and Catalysis
ResumoThe reaction between MgClOH and TiCl4 in ethylacetate solution affords an unusual binuclear MgTi complex arising from a OH ligand exchange between Mg and Ti atoms. The molecular and crystal structure of the title adduct has been determined by X-ray diffraction. The structure was solved by direct and Fourier methods and refined by blocked full-matrix least-squares to R = 0.078 using 4031 observed reflections. The crystal system is triclinic, space group P1−, with two molecules per cell. The unit cell constants are a = 9.623(3), b = 9.783(3), c = 17.015(5) Å, α=99.82(2)°, β=96.49(2)° and γ = 111.15(2)°. The structure is built up from bi- nuclear molecules, Mg and Ti atoms are placed within two slightly deformed octahedra sharing an edge by a double chlorine bridge. The structure undergoes a high degree of positional disorder, which obviously limits the accuracy of the results.
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