Crystal structure of [N-(2-carbamoylethyl)iminodiacetato]-aqua(1,10-phenanthroline)cobalt(III) chloride 3.5 hydrate

The crystal structure of [N-(2-carbamoylethyl)iminodiacetato]-aqua(1,10-phenanthroline)cobalt(III) chloride 3.5 hydrate [Co(Ceida)(H2O)(Phen)Cl .3.5H(2)O (I) has been determined by H-1 NMR technique and X-ray diffraction analysis. The crystals are triclinic, a = 10.352(2) Angstrom, b = 12.534(3) Angstrom, c = 20.665(4) Angstrom, alpha = 107.02(3)degrees, beta = 92.22(3)degrees, gamma = 111.63(3)degrees, Z= 4, space group P (1) over bar, and R = 0.0438. The unit cell involves two crystallographically nonequivalent but virtually identical cationic complexes [Co(Ceida)(H2O)(Phen)](+). The tridentate chelate ligand Ceida(2-) (N + 20) occupies the face in the coordination octahedron of the Co atom, and the propionamide group remains free. The mean bond lengths are as follows: Co-O-Ceida, 1.876 Angstrom; Co-N-Ceida, 1.981 Angstrom; Co-N-Phen, 1.945 Angstrom; and Co-O-w 1.915 Angstrom. In the structure, the arrangement of cationic complexes and certain water molecules exhibits a pseudosymmetry (the 2(1) axis). The cations acid water molecules are located in the layers, and the anions are arranged between the layers. The structural elements are linked by hydrogen bonds and van der Waals interactions. (C) 2001 MAIK "Nauka/Interperiodica".