FORMATION OF 3-VERTEX METALLABORANES FROM MONOBORANE PRECURSORS - X-RAY CRYSTAL-STRUCTURES OF THE MOLYBDENUM AND RUTHENIUM COMPLEXES [MO(ETA-C5H5)2H(ETA-2-B2H5)] AND [RU(ETA-C5ME5)(PME3)(ETA-2-B2H7)] - Grebenik, P; Green, M; Kelland, M; Leach, J; Mountford, P; Stringer, G; Walker, N; Wong, L (JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1988)