Synthesis and X-ray structure characterization of ethylenediammonium tetrathiomolybdate

563-567The passage of hydrogen sulphide gas into an aqueous ammonium heptamolybdate solution in the presence of ethylenediamine leads to the formation of stable ethylenediammonium tetrathiomolybdate 1 in good yields. The title compound has been characterized by IR, UV-Vis and elemental analysis and its structure has been determined by single crystal X-ray crystallography. Ethylenediammonium tetrathiomolybdate crystallizes in the orthorhombic space group P212121 with the following unit cell dimensions for C2H10N2S4Mo (M=286.3) a=8.582(5) Å, b=9.276(5) Å, c=11.792(5) Å, α=β=γ<span style="font-size:12.0pt; line-height:115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:hi"="">= 90° v = 938.7(8) Å3, Z=4. Dc=2.026 g.cm-3. The structure of the title compound consists of tetrahedral tetrathiomolybdate anions, which form an extended three dimensional network in the solid state, with the aid of N-H---S as well as C-H---S hydrogen bonding interactions with the organic cation.