Tris (pyrazolyl) borate

Tris (pyrazolyl) borates ( also known as tripyrazolylboranates and abbreviated as Tp ) are salts with anions of the formula BH (N ₂ C ₃ H ₃ ) ₃ ^- . The tris (pyrazolyl) borate ion is a ligand in modern complex chemistry . As a 6-electron donor, it has similarities with the cyclopentadienyl anion. However, it takes up significantly more space and is a stronger electron donor .

structure

Structure of the tris (pyrazole) borate anion

Three pyrazole rings are bound with their nitrogen atoms to a central boron atom, which also bears an additional hydrogen atom . The second nitrogen atom of each pyrazole ring is available for complex formation. Tp is thus a 3-dentate 6-electron donor.

literature

• Horst Brombacher: Aspects of the reactivity of tris (pyrazolyl) borate-zinc alkoxide and tris (pyrazolyl) borate-zinc hydride complexes . Dissertation, 2003.
• Heather De Bari, Marc Zimmer: Structural Analysis of the Conformational Flexibility of Tris (pyrazolyl) borate Ligands and Their Analogues . Inorg. Chem. , 43 (11), 3344-3348, 2004, doi : 10.1021 / ic0498992 .