UNSPECIFIED. (2004) Synthesis of di-, tri- and penta-nuclear titanium(IV) species from reactions of titanium(IV) alkoxides with 2,2 '-biphenol (H2L1) and 1,1 '-binaphthol (H2L2); crystal structures of [Ti-3(mu(2)-OPri)(2)(OPri)(8)L-1], [Ti-3(OPri)(6)L-3(1)], [Ti-5(mu(3)-O)(2)(mu(2)-OR)(2)(OR)(6)L-4(1)] (R = OPri, OBun) and [Ti-2(OPri)(4)L-2(2)]. DALTON TRANSACTIONS (12). pp. 1846-1851. ISSN 1477-9226

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Abstract

Reaction of titanium(IV) alkoxides [Ti(OR)(4)] (R = OPri, OBun) with 2,2'-biphenol [C12H8(OH)(2), H2L1] affords two trinuclear species [Ti-3(OPri)(10)L-1] and [Ti-3(OPri)(6)L-3(1)] each possessing an open- chain V-shaped arrangement of three titanium atoms with the former having both bridging alkoxide and biphenylate groups and the latter having only biphenylate as bridging groups. Variations in reaction conditions yield the pentanuclear species [Ti-5(mu(3)-O)(2)(OR)(8)L-4(1)] (R = OPri, OBun) which have two central bridging oxygen atoms in the Ti5 framework and bridging alkoxide and biphenylate groups. In contrast 1,1'-binaphthol [C24H12(OH)(12), H2L2] yields the dinuclear [Ti-2(OPri)(4)L-2(2)] where only the binaphthylate ligands act as bridging groups. Some of the compounds show catalytic activity in esterification reactions.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry
Journal or Publication Title:	DALTON TRANSACTIONS
Publisher:	ROYAL SOC CHEMISTRY
ISSN:	1477-9226
Date:	2004
Number:	12
Number of Pages:	6
Page Range:	pp. 1846-1851
Identification Number:	10.1039/b404197f
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/8361

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