Reactions of acetonitrile coordinated to a nitrosylruthenium complex with H2O or CH(3)OH under mild conditions: structural characterization of imido-type complexes.

The reaction of cis-Ru(NO)(CH(3)CN)(bpy)(2) (bpy = 2,2'-bipyridine) in H(2)O at room temperature proceeded to afford two new nitrosylruthenium complexes. These complexes have been identified as nitrosylruthenium complexes containing the N-bound methylcarboxyimidato ligand, cis-Ru(NO)(NH=C(O)CH(3))(bpy)(2), and methylcarboxyimido acid ligand, cis-Ru(NO)(NH=C(OH)CH(3))(bpy)(2), formed by an electrophilic reaction at the nitrile carbon of the acetonitrile coordinated to the ruthenium ion. The X-ray structure analysis on a single crystal obtained from CH(3)CN-H(2)O solution of cis-Ru(NO)(NH=C(O)CH(3))(bpy)(2)(3) has been performed: C(22)H(20.5)N(6)O(2)P(2.5)F(15)Ru, orthorhombic, Pccn, a = 15.966(1) A, b = 31.839(1) A, c = 11.707(1) A, V = 5950.8(4) A(3), and Z = 8. The structural results revealed that the single crystal consisted of 1:1 mixture of cis-Ru(NO)(NH=C(O)CH(3))(bpy)(2) and cis-Ru(NO)(NH=C(OH)CH(3))(bpy)(2) and the structural formula of this single crystal was thus Ru(NO)(NH=C(OH(0.5))CH(3))(bpy)(2)(2.5). The reaction of cis-Ru(NO)(CH(3)CN)(bpy)(2) in dry CH(3)OH-CH(3)CN at room temperature afforded a nitrosylruthenium complex containing the methyl methylcarboxyimidate ligand, cis-Ru(NO)(NH=C(OCH(3))CH(3))(bpy)(2). The structure has been determined by X-ray structure analysis: C(25)H(29)N(8)O(18)Cl(3)Ru, monoclinic, P2(1)/c, a = 13.129(1) A, b = 17.053(1) A, c = 15.711(1) A, beta = 90.876(5) degrees, V = 3517.3(4) A(3), and Z = 4.