Assembly of dinuclear copper(II) secondary building units into polymeric complexes: crystal structures and magnetic properties

作者：Shi Wen Bo^*; Cui Ai Li; Kou Hui Zhong

来源：CrystEngComm, 2014, 16(34): 8027-8034.

DOI：10.1039/c4ce01082e

Four Cu(II) complexes, the one-dimensional [Cu(HL1)(2)(CuCl4)](n) (1), {[Cu-2(L-1)(2)(N(CN) (2))(CH3OH)](ClO4)}(n) (2), dinuclear [Cu-2(L-2)(2)Cl-2] (3), and two-dimensional layered [Cu-2(L-2) (2)(N(CN)(2))(2)](n) (4) were synthesized by Cu(II) salts (CuCl2 center dot 2H(2)O or Cu(ClO4)(2)center dot 6H(2)O), alkanol bidentate ligands trans-2-(1-pyrazolyl) cyclohexanol (HL1) or 3,5-dimethyl-N-hydroxyethyl-pyrazolyl (HL2) together with sodium dicyanamide. For complex 1, the bridging chlorine atoms of the tetrahedral [CuCl4](2-) moieties are located at the Jahn-Teller axis of the elongated octahedral Cu(II), forming an alternate elongated-octahedral-tetrahedral Cu(II) chain complex. For complexes 2, 3 and 4, the alkyl oxygen atoms of the deprotonated ligands HL1 and HL2 bridge two Cu(II) ions, yielding a dinuclear Cu(II) unit [Cu-2(L-x)(2)](2+) (x = 1, 2), and one-or two-dimensional complexes via bridging dicyanamide ligands. Complex 1 shows weak ferromagnetic coupling, whilst complexes 2-4 display strong antiferromagnetic coupling or are even nearly diamagnetic due to the large Cu-O-Cu bond angles.

• 出版日期2014
• 单位清华大学