Salze der 1.2-Hydrazin-bis(dithiocarbonsäure): Darstellung, Schwingungsspektren und Struktur / Preparation, Vibrational Spectra and Structure of Alkahmetal Salts of the 1,2-Hydrazine-bis(dithiocarboxylic Acid)

Abstract

The following salts of the 1,2-hydrazine-bis(dithiocarboxylic acid) have been prepared: M2[S2CNH -NHCS2], M = Na, K and M3[S2CN-NHCS2], M = Na, K. In the solvated crystals K2[S2CNH-NHCS2] · 4 CH3OH (a = 718.0(5), b = 1329.3(8), c = 937.7(9) pm, β = 109.26(6)°, space group C2/m, Z = 2) the [S2CNH-NHCS2]2- ion possesses crystallographic C2h symmetry, i.e. a trans planar structure with a N-N bond length of 139.2(3) pm. Vibrational spectra indicate a lower symmetrical anion in the unsolvated crystals. In the trianion [S2CN-NHCS2]3- the C-N stretching vibrations are observed at 1400 and 1310 cm-1.