Crystal Structure of Disodium(I) cis-Bis(ethane-1,2-diamine)disulfitocobaltate(III) Perchlorate Trihydrate

Abstract

The crystal structure of the title compound, Na₂C10₄ [CO(C₂N₂H₈)₂(SO₃)₂],3H₂O, has been determined by single-crystal X-ray diffraction at 295(1) K and refined by least squares to a residual of 0.033 for 2693 'observed' reflections. Crystals are monoclinic, P2₁/c, a 16.271(3), b 12.298(2), c 9.567(2) Å, β 105.85(1)º, Z 4. The Co-S distances differ significantly, probably a consequence of interaction of the sulfite oxygen atoms with adjacent sodium ions [Co-S, 2.206(1), 2.233(1) Å]; the Co-N distances trans to the sulfite groups are significantly longer [2.015(3), 2.003(4) Å] than those trans to each other [1.964(4), 1.959(3) Å].