Asymmetric bis(pyrazolyl)hydroborato ligands via direct synthesis: structural characterization of thallium and zinc complexes†

Abstract

Asymmetrically substituted bis(pyrazolyl)hydroborato ligands, in which the two pyrazolyl groups possess different substituents, have been synthesized by the direct reaction of a ca. 1∶1 molar mixture of the respective pyrazoles with LiBH₄.