The structure of racemic μ‐amido‐μ‐peroxo‐bis[bis(ethylenediamine)cobalt(III)] trithiocyanate hydrate

Racemic μ‐amido‐μ‐peroxo‐bis[bis(ethylenediamine)cobalt(III)] trithiocynate hydrate, DL‐[(en)2Co · μ(NH2, O2)· Co(en2)](SCN)3 · H2O, crystallizes in the orthorhombic space group Pbca with lattice constants a = 26.766(2), b = 12.727(1) and c = 14.461(1) Å; Z = 8. Intensity data were colleted visually from WEISSENBERG photographs. The structure was determined by PATTERSON methods and refined by FOURIER and least‐squares techniques. The final R index for 2172 observed reflections of non‐zero weight is 0.076. The cobalt atoms are octahedrally coordinated. The five‐membered central ring of the cations is considerably puckered, The OO bond distance in the O2 bridge is 1.46 Å. This geometry indicates that the O2 bridge is properly described as a peroxo group.