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-phe nanthroline)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 anal ysis. The crystals are triclinic, a = 10.352(2) Angstrom, b = 12.534(3) Ang strom, c = 20.665(4) Angstrom, alpha = 107.02(3)degrees, beta = 92.22(3)deg rees, 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 vi rtually identical cationic complexes [Co(Ceida)(H2O)(Phen)](+). The trident ate chelate ligand Ceida(2-) (N + 20) occupies the face in the coordination octahedron of the Co atom, and the propionamide group remains free. The me an bond lengths are as follows: Co-O-Ceida, 1.876 Angstrom; Co-N-Ceida, 1.9 81 Angstrom; Co-N-Phen, 1.945 Angstrom; and Co-O-w 1.915 Angstrom. In the s tructure, the arrangement of cationic complexes and certain water molecules exhibits a pseudosymmetry (the 2(1) axis). The cations acid water molecule s 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 in teractions. (C) 2001 MAIK "Nauka/Interperiodica".