Tetraphenoxoborate complexes of barium: crystal structures of the metalloborates [Ba(thf[hair space])4{B(OPh)4}2] and [Ba(dme)2{B(OPh)4}2][hair space]

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R. John Errington, Mustafa Tombul, Gary L. P. Walker, William Clegg, Sarah L. Heath and Lynne Horsburgh


Abstract

The new molecular phenoxides [BaB2(OPh)8(thf)4] 1 and [BaB2(OPh)8(dme)2] 2 have been synthesised from B(OPh)3 and either a preformed barium phenoxide or barium mental in the presence of phenol; X-ray structure determinations reveal that the barium is eight-coordinate in both compounds and that the chelating [B(OPh)4] groups occupy trans positions in 1 but cis positions in 2.


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