Abstract

The title compds., [Mo(C2H4NO2)2(NO)2], (I), and [Mo(C2H6NS)2(NO)2]CH3CN, (II), contain distorted octahedral complexes in which the monoanionic N,S- and N,O-bidentate ligands coordinate the molybdenum centers 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 compd. has a single complete complex in the asym. unit on a general position. Six N-HO contacts with NO distances of less than 3.2 .ANG. are obsd. in (I) between the amine groups and the nitrosyl and carboxylate O atoms. In the 1:1 solvate (II), the acetonitrile mol. forms short N-HN contacts (NN < 3.2 .ANG.) between the solvent N atoms and one of the amine H atoms. In addn., three weak intermol. N-HS interactions (NS > 3.3 .ANG.) contribute to the stabilization of the structure of (II)