Reactivity of Tris(1-pyrazolyl)methane Towards Ru0 Complexes

By treating tris(1-pyrazolyl)methane (tpm) with suitably activated [Ru(cod)(cot)] and [Ru(cod)(nap)] (cod = eta(4)-cycloocta-1,5-diene, cot = eta(6)-cycloocta-1,3,5-triene, nap = eta(6)-naphthalene) the (hydrido)Ru-II species [Ru(N-2,N-2',C-5"tpm)(cod)H] with cyclometalated tpm was obtained. This complex reacted with chloroform at room temperature to give [Ru(N-2,N-2',C-5"tpm)(cod)Cl] and dichloromethane. The coordination and symmetry of the novel complexes were elucidated by H-1 and C-13 NMR spectroscopy.