Synthesis and Properties of Poly(pyrazolyl)borate and Related Boron-Centered Scorpionate Ligands. Part A: Pyrazole-Based Systems

This review is intended to cover the developments in the chemistry of poly(azolyl)borates through the years 2000-2008, based on the main synthetic methods, coordination properties, spectroscopic and structural features of this important class of ligands. The subject matter is the chemistry of substituted bis-, tris- and tetrakis-(pyrazolyl)borate ligands. In this review we provide essential information to allow the reader to probe more deeply into the main aspects of the chemistry of these fascinating and flexible ligands. This review would also demonstrate the enormous potential of poly(pyrazolyl)borates chemistry, as also the future perspectives in this field.