S. Trofimenko, J. Calabrese, P. Domaille
Mar 1, 1989
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Inorganic Chemistry
Abstract
The synthesis, structures, and coordination chemistry of a series of polypyrazolylborate ligands, [H n B(3-isopropylpyrazol-1-yl) 4−n ] − and [HB(3-isopropyl-4-bromopyrazol-1-yl) 3 ] − , are presented. These ligands are made by the reaction of tetrahydroborate ion with the appropriate pyrazole. A series of metal complexes was prepared and characterized by analytical and spectroscopic data. In addition, four complexes were characterized by means of X-ray diffraction techniques. The results presented here indicated that these ligands have properties that are unique and transitional from those of the previously reported, relatively unhindered ligands such as [H n B(pyrazolyl-1-yl) 4−n ] − to the sterically bulky ligands [H n B(3-R-pyrazol-1-yl) 4−n ], where R=tert-butyl and phenyl groups