Diacetamidinium sulfate

Abstract

In the crystal structure of the title compound, 2C2H7N2+·SO42−, which contains four cations and two anions in the asymmetric unit, the ions are interconnected by an extensive hydrogen-bonding system whereby two of the O atoms of sulfate ion are hydrogen-bonded to the amidinium H atoms of two cations, leading to the formation of two eight-membered rings. The two remaining O atoms interconnect two H atoms of acetamidinium cations, forming an infinite chain. The C...N separations within the H2N...C...NH2 moieties are similar, with an average value of 1.305 (2) Å, which is in good agreement with a delocalization model.