title: Synthesis and structural characterization of novel tetranuclear organotitanoxane derivatives.
abstract: Synthesis of the novel titanoxane compounds, [(TiCl)(TiOH){(Ti)[μ-(η(5)-C(5)Me(4)SiMe(2)O-κO)](2)(μ-O)}(2)(μ-O)] (4) and [{Ti[μ-(η(5)-C(5)Me(4)SiMe(2)O-κO)](μ-O)}(4)] (5) by controlled reaction of the dinuclear titanium oxo complex [{Ti{μ-(η(5)-C(5)Me(4)SiMe(2)O-κO)}Cl](2)(μ-O)] (1) with 2 equiv of LiOH is reported. Complex 4 is innovative and remarkable. It is one of the rare known examples of tetranuclear stable terminal hydroxo titanium complexes, with an open-chained structure, which coincides with the transient metal monohydroxo proposed in the stepwise pathway employed to justify the formation of the hexanuclear complex [{Ti[μ-(η(5)-C(5)Me(4)SiMe(2)O-κO)](μ-O)}(6)] (3) from 1. (1)H DOSY experiments were used to characterize complex 4. In addition, the structures of compound 5 and of precursor 1 were determined by single-crystal X-ray diffraction studies.
authors.affiliation: Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871, Alcalá de Henares, Spain.
authors.forename: María
authors.initials: M
authors.lastname: Ventura
authors.forename: Carmen
authors.initials: C
authors.lastname: Ramírez de Arellano
authors.forename: Marta E G
authors.initials: ME
authors.lastname: Mosquera
authors.forename: Gerardo
authors.initials: G
authors.lastname: Jiménez
authors.forename: Tomás
authors.initials: T
authors.lastname: Cuenca