The synthesis of W-O-M (M=Al, Ti, Ni, Zn) μ-oxo clusters by hydrolysis of tungsten aminoalkoxides and their structural characterisation

Hamid Choujaa, Andrew L. Johnson, Gabriele Kociok-Köhn, Kieran C. Molloy

Research output: Contribution to journalArticle

Abstract

Three novel heterobimetallic W-O-M clusters have been synthesised by the hydrolysis of mixtures of W(O)(OPr)(bdmap) with Ti(OPr), Zn(acac) and Al(OPr), respectively. A fourth, related W-O-Ni cluster has been obtained by adventitious hydrolysis of a mixture of W(O)(OMe) and Ni(dmap) [Hbdmap=1,3-bis-(dimethylamino)-propan-2-ol; Hdmap=1-(dimethylamino)propan-2-ol]. WTi(O)(μ-O)(OPr)(μ-bdmap) (1) adopts a central WTiO core with an adamantane-like structure while WAl(O)(OPr)(μ-O)(μ-bdmap) (3) has an analogous WAlO core but which adopts an isomeric cube arrangement with two parallel sides missing. WZn(O)(μ-O)(OPr)(acac)(μ-bdmap) (2) is similar to 1 but the two bidentate acac groups result in the elimination of one μ-O bridge; the resulting WZnO core forms an adamantane structure with one W-O-Zn linkage missing. In contrast, WNi(O)(OMe)(μ-OMe)(μ-O)(dmap) (4) forms a tetrameric square of four linked W-O-Ni units.
Original languageEnglish
Pages (from-to)199-206
Number of pages8
JournalPolyhedron
Volume63
DOIs
Publication statusPublished - 31 Oct 2013

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