Crystal structure of catena-poly[diaqua(μ-iminodiacetato-N,O,O′:O")cobalt(II)]

The crystal structure of the [Co(C4H5NO4)(H2O)(2)] complex has been determined by X-ray diffraction analysis (lambda Mo, R = 0.0237 for 768 reflections). The crystals are orthorhombic, a = 14.345(1) Angstrom, b = 5.234(1) Angstrom, c = 9.780(1) Angstrom, Z = 4, d(calcd) = 2.045 g cm(-3), and space group Pca2(1). The donor atoms (one N and two O atoms) of the iminodiacetate ion (Ida) are located on the same octahedron face around the Co atom [Co-N, 2.120(3) A; Co-O, 2.063(3) and 2.151(3) Angstrom]. The O atoms of two water molecules are in the trans positions relative to the O atoms of the carboxylate groups [Co-O, 2.126(3) and 2.157(3) Angstrom]. The sixth coordination site is occupied by the O atom of the adjacent Ida ion [Co-O, 2.054(3) Angstrom], which results in the formation of infinite chains in the structure. (C) 2000 MAIK "Nauka/Interperiodica".