Early-late heterobimetallic alkoxides as model systems for late-transition-metal catalysts supported on titania

Rosa Fandos; Carolina Hernández; Antonio Otero; Ana Rodríguez; María José Ruiz; Pilar Terreros

doi:10.1002/chem.200390075

Early-late heterobimetallic alkoxides as model systems for late-transition-metal catalysts supported on titania

Chemistry. 2003 Feb 3;9(3):671-7. doi: 10.1002/chem.200390075.

Authors

Rosa Fandos¹, Carolina Hernández, Antonio Otero, Ana Rodríguez, María José Ruiz, Pilar Terreros

Affiliation

¹ Departamento de Química Inorgánica, Orgánica y Bioquímica Universidad de Castilla-La Mancha Facultad de Ciencias del Medio Ambiente Avd. Carlos III, s/n, 45071 Toledo, Spain.

PMID: 12569459
DOI: 10.1002/chem.200390075

Abstract

Titanium complexes with chelating alkoxide ligands [TiCp*(O(2)Bz)(OBzOH)] (1) and [TiCp*(Me)((OCH(2))(2)Py)] (2) were synthesised by reaction of [TiCp*Me(3)] (Cp*=eta(5)-C(5)Me(5)) with 2-hydroxybenzyl alcohol ((HO)(2)Bz) and 2,6-pyridinedimethanol ((HOCH(2))(2)Py), respectively. Complex 1 reacts with [(M(mu-OH)(cod))(2)] (M=Rh, Ir) to yield the early-late heterobimetallic complexes [TiCp*(O(2)Bz)(2)M(cod)] [M=Rh (3), Ir (4)]. Carbon monoxide readily replaces the COD ligand in 3 to give the rhodium dicarbonyl derivative [TiCp*(O(2)Bz)(2)Rh(CO)(2)] (5). Compound 2 reacts with [(M(mu-OH)(cod))(2)] (M=Rh, Ir) with protonolysis of a Tibond;Me bond to give [TiCp*((OCH(2))(2)Py)(mu-O)M(cod)] [M=Rh (6), Ir (7)]. The molecular structures of complexes 3, 5 and 7 were established by single-crystal X-ray diffraction studies.