The synthesis and molecular structure of [TmPh]2Pb: a complex with an ‘inverted’ η4-coordination mode for the tris(2-mercapto-1-phenylimidazolyl)hydroborato ligand

The tris(2-mercaptoimidazolyl)borate lead complex, [TmPh]2Pb, may be synthesized by reaction of Pb(ClO4)2 with 2 equivalents of [TmPh]Li. The molecular structure of [TmPh]2Pb has been determined by X–ray diffraction, revealing that it possesses an unusual structure with an inverted η4-coordination mode for the [TmPh] ligand which includes a Pb···H–B interaction.