Use of pyrazolyl ligands for the formation of a bimetallic cobalt–ruthenium complex

Abstract: A straightforward route to Ru(pyz)2(Hpyz)4 (Hpyz=pyrazole) has been developed. This has been found to react readily with a modified Co(pyrazolylborate)Cl complex in the presence of triethylamine as an HCl acceptor to yield a bimetallic cobalt–ruthenium complex, in which the two metals are each six-coordinate, and bridged by three pyrazolyl anions. Both species have been characterized structurally, as has a modified Co(pyrazolylborate)2 complex. [Copyright &y& Elsevier]