P. Ghosh et al., ASYMMETRIC BIS(PYRAZOLYL)HYDROBORATO LIGANDS VIA DIRECT SYNTHESIS - STRUCTURAL CHARACTERIZATION OF THALLIUM AND ZINC-COMPLEXES, Journal of the Chemical Society. Dalton transactions (Print), (20), 1998, pp. 3355-3357
Asymmetrically substituted bis(pyrazolyl)hydroborato ligands, i.e. [H2
B(pz(RR'))(pz(But2))](-), in which the two pyrazolyl groups possess di
fferent substituents, have been synthesized by the direct reaction of
a ca. 1:1 molar mixture of the respective pyrazoles with LiBH4.