A novel adipate bridged supramolecular layer: Crystal structure of the cobalt(II) complex [(mu-C6H8O4)(4/2)Co(mu-H2O)(2)Co(H2O)(4)] center dot 4H(2)O

The pale-rose compound [(mu-C6H8O4)(4/2)Co(mu-H2O)(2)Co(H2O)(4)] . 4 H2O wa s prepared from adipic acid and CoCO3 in aqueous solution. The crystal stru cture (monoclinic, P2(1)/n (no. 14), a = 8.061(1), b = 15.160(2), c = 9.708 (2) Angstrom, beta = 90.939(7)degrees, Z = 2, R = 0.0405, wR(2) = 0.0971) c onsists of adipate bridged supramolecular (2)(proportional to)[(mu-C6H8O4)( 4/2)Co(mu-H2O)(2)Co(H2O)(4)] layers and hydrogen bonded H2O molecules. The cobalt atoms Co1 and Co2 are distorted octahedrally coordinated by the O at oms of two bridging trans-H2O molecules and four bidentate adipate anions ( Co1) and by the O atoms of two bridging trans-H2O molecules and four monode ntate H2O molecules (Co2), respectively Equatorial bonds:d(Co1-O) = 2.048 A ngstrom (2x), 2.060 Angstrom (2x); d(Co2-O) = 2.057 Angstrom (2x), 2.072 An gstrom (2x). Axial bonds: d(Co1-O) = 2.235 Angstrom (2x); d(Co2-O)= 2.156 A ngstrom (2x).