SYNTHESIS, STRUCTURE, AND REACTIVITY OF POTASSIUM PYRAZOLATO COMPLEXES - THE FIRST STRUCTURALLY DOCUMENTED ETA(2)-PYRAZOLATO COORDINATION BY A MAIN-GROUP METAL

Several (pyrazolato)potassium complexes have been prepared by deproton ation of the parent pyrazoles with potassium hydride in tetrahydrofura n. A crystal structure of one derivative shows a hexameric formulation , with each potassium atom bonded to the nitrogen atoms of one pyrazol ato ligand in an eta(2)-fashion and to the nitrogen atoms of two adjac ent pyrazolato ligands with eta(1)-interactions. The utility of these complexes in the synthesis of new pyrazolato complexes is demonstrated .