Synthesis of di-, tri- and penta-nuclear titanium(IV) species from reactions of titanium(IV) alkoxides with 2,2'-biphenol (H(2)L(1)) and 1,1'-binaphthol (H(2)L(2)); crystal structures of [Ti(3)(mu(2)-OPr(i))(2)(OPr(i))(8)L(1)], [Ti(3)(OPr(i))(6)L(1)(3)], [Ti(5)mu(3)-O)(2)(mu(2)-OR)(2)(OR)(6)L(1)(4)](R = OPr(i), OBu(n)) and [Ti(2)(OPr(i))(4)L(2)(2)

Dalton Transactions : an International Journal of Inorganic Chemistry
Jonathan P CordenMalcolm G H Wallbridge

Abstract

Reaction of titanium(iv) alkoxides [Ti(OR)(4)](R = OPr(i), OBu(n)) with 2,2[prime or minute]-biphenol [C(12)H(8)(OH)(2), H(2)L(1)] affords two trinuclear species [Ti(3)(OPr(i))(10)L(1)] and [Ti(3)(OPr(i))(6)L(1)(3)] 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)([micro sign](3)-O)(2)(OR)(8)L(1)(4)](R = OPr(i), OBu(n)) which have two central bridging oxygen atoms in the Ti(5) framework and bridging alkoxide and biphenylate groups. In contrast 1,1[prime or minute]-binaphthol [C(24)H(12)(OH)(2), H(2)L(2)] yields the dinuclear [Ti(2)(OPr(i))(4)L(2)(2)] where only the binaphthylate ligands act as bridging groups. Some of the compounds show catalytic activity in esterification reactions.

References

Aug 29, 2002·Journal of the American Chemical Society·Jaume BalsellsPatrick J Walsh
Jan 9, 2003·Chemical Reviews·Vernon C Gibson, Stefan K Spitzmesser
Aug 14, 2003·Chemical Reviews·Yu ChenAndrei K Yudin
Aug 14, 2003·Chemical Reviews·Pavel KocovskýMartin Smrcina

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Citations

Jun 2, 2016·Journal of the American Chemical Society·Wei-Hui FangJian Zhang
May 5, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Clément ChaumontMarc Henry
Jun 23, 2016·Chemical Communications : Chem Comm·Ning LiDominic S Wright
Nov 19, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Carine DieboldMarc Henry
Apr 21, 2016·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Toshiro Harada
Dec 8, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Christos M KizasAnastasios J Tasiopoulos
Sep 14, 2007·Inorganic Chemistry·Lucjan B JerzykiewiczPiotr Sobota

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