Bis(glycinato‐κ 2 N , O )dinitrosylmolybdenum(0) and bis(2‐aminoethanethiolato‐κ 2 N , 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 Å 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 Å) 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 Å) contribute to the stabilization of the structure of (II).