SEARCH Articles Figures Tables Polypyrazolylborate Polypyrazolylborate Polypyrazolylborate complexes Polypyrazolylborate ligands Polypyrazolylborate ligands synthesis Polypyrazolylborate ring systems Polypyrazolylborates bidentate Polypyrazolylborates biological applications Polypyrazolylborates metal complexes Polypyrazolylborates preparation Polypyrazolylborates tridentate Pyrazoles polypyrazolylborates Transition metal complexes polypyrazolylborates