Bis(glycinato-kappa2N,O)dinitrosylmolybdenum(0) and bis(2-aminoethanethiolato-kappa2N,S)dinitrosylmolybdenum(0) acetonitrile monosolvate.

The title compounds, [Mo(C(2)H(4)NO(2))(2)(NO)(2)], (I), and [Mo(C(2)H(6)NS)(2)(NO)(2)].CH(3)CN, (II), contain distorted octahedral complexes in which the monoanionic N,S- and N,O-bidentate ligands coordinate the molybdenum centres in different modes. The anionic O atoms of the glycinate ligands in (I) are coordinated trans to the nitrosyl ligands and the amine N atoms are located trans to each other, whereas in (II) the anionic S atoms are coordinated trans to each other and the amine N atoms are located trans to the nitrosyl ligands. Each compound has a single complete complex in the asymmetric unit on a general position. Six N-H...O contacts with N...O distances of less than 3.2 A are observed in (I) between the amine groups and the nitrosyl and carboxylate O atoms. In the 1:1 solvate (II), the acetonitrile molecule forms short N-H...N contacts (N...N < 3.2 A) between the solvent N atoms and one of the amine H atoms. In addition, three weak intermolecular N-H...S interactions (N...S > 3.3 A) contribute to the stabilization of the structure of (II).