Acta Crystallographica Section E

Structure Reports Online

Volume 57, Part 9 (September 2001)

metal-organic compounds

Acta Cryst. (2001). E57, m396-m398 [ doi:10.1107/S160053680101306X ]

A sterically crowded ytterbium(II) thiolate: trans-bis(2,4,6,2'',4'',6''-hexaisopropyl-1,1':3',1''-terphenyl-2'-thiolato-S)tetrakis(tetrahydrofuran-O)ytterbium(II)

M. Niemeyer

Abstract: In the title complex [Yb(SAr*)₂(thf)₄] (Ar* is 2,6-Trip₂C₆H₃, C₃₆H₄₉S, where Trip is 2,4,6-ⁱPr₃C₆H₂; thf is tetrahydrofuran, C₄H₈O), the Yb atom occupies a special position on the inversion center. It shows a slightly distorted trans-octahedral environment formed by the O atoms of four tetrahydrofuran ligands (average Yb-O 2.400 Å) and the S atoms of two thiolate ligands [Yb-S 2.8023 (13) Å]. The overcrowding caused by the sterically encumbered Ar* ligands is reflected in the large Yb-S-C angle of 151.16 (16)°.