The synthesis, characterization, and X-ray crystal structure of trans-bis(1,3-diamino-2-propanolato-N,N′,O)- cobalt(III) perchlorate trihydrate

The crystal structure of [Co(C3H9N2O)2]ClO4⋅3H2O was established by single-crystal X-ray diffraction techniques. The compound crystallized in the monoclinic space group P21 with unit cell dimensions a = 6.715(2) Å, b = 12.097(3) Å, c = 9.904(3) Å, β = 100.80(3)○, and z = 2. The final R value for 1359 reflections was 0.039. The 1,3-diamino-2-propanolato ligands are tridentately coordinated to cobalt atoms that have slightly distorted octahedral coordination. The five-membered chelate rings exhibit conformations between pure twist and pure envelope, while the six-membered ring adopts a boat confirmation.