Acta Cryst. (2001). E57, m578-m580 [ doi:10.1107/S1600536801018797 ]
Abstract: The title compound, [Yb(Dpp)2(thf)2] [Dpp = 2,6-Ph2C6H3 (m-terphenyl), C18H13, and thf = tetrahydrofuran, C4H8O], is the first example of a structurally characterized YbII diaryl. The Yb atom shows a strongly distorted tetrahedral environment formed by the C atoms of two aryl groups (average Yb-C = 2.520 Å) and the O atoms of two tetrahydrofuran ligands (average Yb-O = 2.412 Å). In addition, there are two weak 1--arene interactions (average YbC = 3.138 Å) involving ortho-C atoms of the m-terphenyl phenyl groups.
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