Meiere, S. H.; Brooks, B. C.; Gunnoe, B.; Carrig, E. H.; Sabat, M.; Harman, D. Dihapto Coordination of Aromatic Molecules by the Asymmetric π-Bases TpRe(CO)(L) (Tp = hydridotris(pyrazolyl)borate; L = tBuNC, PMe3, pyridine, 1-methylimidazole, or NH3). Organometallics 2001, 20, 3661-3671.