Crystal structure of trans-tetraamminebis(isothiocyanato)cobalt(III) acetate-acetic, acid (III)

Abstract

The crystal structure of the title compound, trans-[Co(NH₃)₄(NCS)₂] O₂CCH₃,HO₂CCH₃, has been determined at 295(1) K by single-crystal X-ray diffraction and refined by least squares to a residual of 0.11 for 300 'observed' reflections. Crystals are orthorhombic, Pbam, a 14.851(9), b 7.068(4), c 7.031(4) Ǻ, Z 2. The cation is centred at the origin of the cell with cobalt site symmetry 2/m, so that only one ammonia and one- half of the N-bonded thiocyanate is crystallographically independent. Co-N(CS) is short (1.91(2) Ǻ); Co-N(H₃) being 1.96(2) Ǻ. Only one crystallographically independent acetate species is found, lying close to a coplanar, centrosymmetrically related image to which it is presumably bound by a hydrogen bond (O...O 2.40(4) Ǻ).