Synthesis and crystal structure of two {M(4,4 '-dpdo)(2)[N(CN)(2)](2)(H2O)(2)} complexes (M = Co(II), Mn(II); 4,4 '-dpdo=4,4 '-bipyridyl-N,N'-dioxide)

摘要

The ligand 4,4'-bipyridyl-N,N'-dioxide (4,4'-dpdo) was used in the synthesis of two complexes, {Co(4,4'-dpdo)(2)[N(CN)(2)](2)(H2O)(2)} (1) and {Mn(4,4'-dpdo)(2)[N(CN)(2)](2)(H2O)(2)} (2). The complexes were found to be isostructural, triclinic, space group P-1 with Z = 1 and the following unit cell parameters: a = 8.158(8)angstrom, b = 8.865(8) angstrom, c = 9.477(9)angstrom; alpha = 70.988(13)degrees, beta = 78.778(13)degrees, gamma = 71.964(10)degrees; V = 612.8(10) angstrom(3) stop for 1; a = 8.247(14) angstrom b = 9.001(16)angstrom, c = 9.707(17) angstrom; alpha = 71.02(2)degrees, beta = 78.63(2)degrees, gamma = 72.62(2)degrees; V = 646(2) degrees (3)for 2. Final R-values were 0.075 and 0.083 for 1 and 2, respectively. In the molecules of the complexes, Co(II) or Mn(II) cation is coordinated by two O-atoms of two 4,4'-dpdo ligands, two terminal N-atoms of two dicyanamides, and two O-atoms of water molecules. The crystals are molecular, with adjacent complex molecules linked through a system of O-H...N and O-H...O hydrogen bonds.