Crystal structure of catena-poly[diaqua(mu-iminodiacetato-N,O,O ': O '')cobalt(II)]

The crystal structure of the [Co(C4H5NO4)(H2O)(2)] complex has been determi ned by X-ray diffraction analysis (lambda Mo, R = 0.0237 for 768 reflection s). The crystals are orthorhombic, a = 14.345(1) Angstrom, b = 5.234(1) Ang strom, c = 9.780(1) Angstrom, Z = 4, d(calcd) = 2.045 g cm(-3), and space g roup 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 wat er molecules are in the trans positions relative to the O atoms of the carb oxylate groups [Co-O, 2.126(3) and 2.157(3) Angstrom]. The sixth coordinati on site is occupied by the O atom of the adjacent Ida ion [Co-O, 2.054(3) A ngstrom], which results in the formation of infinite chains in the structur e. (C) 2000 MAIK "Nauka/Interperiodica".