Organolanthanoids. XV. The preparation of carboxylato-bis(cyclopentadienyl)ytterbium(iii) complexes by oxidation of bis(cyclopentadienyl)ytterbium(ii)

Glen B. Deacon, Dallas L. Wilkinson

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Abstract

The complexes, Cp2Yb(O2CR) [Cp = cyclopentadienyl; R = Me, CF3, Ph, C6F5, C6Br5, o-MeO2CC6F4 (tmcp), 2, 4, 6-Me3C6H2 (tmp), pyridin-2-yl (pyr)1 or quinolin-2-yl (quin)] have been prepared in good yield by oxidation of bis(cyclopentadienyl)(1, 2-dimethoxyethane)ytterbium(ii) with the appropriate mercury(ii) or thallium(i) carboxylate, generally in tetrahydrofuran. Structural data suggest that four complexes (R = Me, CF3, Ph or C6F5) are dimeric with bridging bidentate carboxylate groups, three (R = tmp, pyr or quin) are monomeric with chelating carboxylates, but the structure is less clear for R = C6Br5 or tmcp. Unit cell dimensions have been determined for bis(cyclopentadienyl)(2, 4, 6-trimethyibenzoato)ytterbium(iii), but the structure could not be solved owing to decomposition of single crystals in the X-ray beam. 

Original languageEnglish
Pages (from-to)845-854
Number of pages10
JournalAustralian Journal of Chemistry
Volume42
Issue number6
DOIs
Publication statusPublished - 1989

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