Synthesis and Structures of Lead(II) Complexes with Hydroxy-Substituted Closo-Decaborate Anions

Mixed-ligand lead(II) complexes with 2,2 '-bipyridyl and [B10H9OH](2-) or monosubstituted hydroxy-substituted closo-decaborate anions with a pendant hydroxy group, separated from the boron cage by an alkoxylic spacer of different lengths [B10H9O(CH2)(x)O(CH2)(2)OH]](2-) (x = 2 or 5) have been synthesized. Compounds have been characterized by IR and multinuclear NMR spectroscopies. The structures of binuclear complex [Pb(bipy)(2)[B10H9OH]](2)Greek ano teleiaCH(3)CN (1Greek ano teleiaCH(3)CN), mononuclear complex [Pb(bipy)(2)[B10H9O(CH2)(2)O(CH2)(2)OH]]Greek ano teleia0.5bipyGreek ano teleiaCH(3)CN (2Greek ano teleia0.5bipyGreek ano teleiaCH(3)CN), and polymeric complex [Pb(bipy)[B10H9O(CH2)(5)O(CH2)(2)OH]](n) (3) have been determined by single-crystal X-ray diffraction. In all three compounds, the co-ordination polyhedra of lead(II) are formed by N atoms from two bipy molecules, O atoms of the substituent attached to the boron cage, and BH groups of the boron cage.