A Very Rare Hydrogen-Bridged Hexanuclear Cu-II Complex Containing a Triangular Cu3O Core Capped by an Unusual Triply Coordinated Perchlorate Anion

作者：Maity Debdulal; Mukherjee Pampa; Ghosh Ashutosh^*; Drew Michael G B; Diaz Carmen; Mukhopadhyay Gurucharan

来源：European Journal of Inorganic Chemistry, 2010, 2010(5): 807-813.

DOI：10.1002/ejic.200900874

• Copper
• Schiff bases
• Magnetic properties
• Solid-state structures

An unusual hexanuclear Cu-II complex, [{[Cu(NHDEPO)](3)(mu(3)-O)(O3ClO)}(2)(mu-H)]center dot 7ClO(4)center dot 4H(2)O (1) was prepared starting from Cu(ClO4)(2)center dot 6H(2)O and the oxime-based Schiff base ligand NHDEPO (= 3-[3-(diethylamino)propylimino]butan-2-one oxime). Structural characterization of the complex reveals that it consists of two triangular Cu3O units, the copper ions being at the corners of an equilateral triangle, separated by an O center dot center dot center dot O distance of 2,447(5) angstrom, held together solely by a proton. In each triangle, the copper atoms are in square-pyramid environments. The equatorial plane consists of the bridging oxygen of the central OH-(O2-) group together with three atoms (N, N, O) of the Schiff base. All Unusual triply coordinated perchlorate ion (mu(3)-kappa O:kappa O':kappa O '') interacts in axial position with the three copper ions, Variable-temperature (2-300 K) magnetic susceptibility measurements show that complex 1 is antiferromagnetically Coupled (J = -148 cm(1-)). The EPR data at low temperature clearly indicates the presence of spin frustration phenomenon in the complex.

• 出版日期2010-2