Synthesis, spectroscopic, thermal and X-ray structure characterization of 1,3-propanediammonium tetrathiomolybdate and N,N,N′,N′-tetramethylethylenediammonium tetrathiomolybdate

The title compounds 1,3-propanediammonium tetrathiomolybdate, 1, and N,N,N′,N′-tetramethylethylenediammonium tetrathiomolybdate, 2, were prepared by reacting the ammonium salt of [MoS4]2− with the corresponding organic diamine. The two diamines have different steric bulk and different numbers of potential hydrogen-bonding donors. This results in different crystal packings viz. a three-dimensional network in 1 and isolated groups consisting of two cations and two anions in 2.