REACTIONS OF TPRE(CO)(2)(THF) WITH AROMATIC-MOLECULES (TP = HYDRIDOTRIS(PYRAZOLYL)BORATE)

The complex TpRe(CO)(2)(THF) (3) (Tp = hydridotris(pyrazolyl)borate) r eacts with a variety of aromatic molecules to form stable binuclear co mplexes of the form {TPRe(CO)(2)}(2)(mu-eta(2)-eta(2)-L), where L = fu ran (6), N-methylpyrrole (7), or naphthalene (8). With thiophene, the TpRe(CO)(2) fragment yields the sulfur-bound mononuclear complex TpRe( CO)(2)(eta(1)-thiophene) (5). In the absence of a suitable ligand, com plex 3 reacts under a nitrogen atmosphere to form Tp(CO)(2)Re(mu-N-2)R e(CO)(2)Tp (9). An X-ray diffraction study of a single crystal of 9 pr ovides geometric details.