Synthesis and crystal structure of a mononuclear Ni(II) complex with tetraazadiphenol macrocycle bearing cyclohexanes

The mononuclear tetraazadiphenol macrocyclic nickel(II) complex [Ni(H2[20]-DCHDC)](ClO4)2 (II) {H2[20]-DCHDC = 14,29-dimethyl-3,10,18,25-tetraazapentacyclo-[25,3,1,04,9,112,16,019,24] ditriacontane-2,10,12,14,16(32),17,27(31),28,30-decane-31,32-diol} has been synthesized by self-assembly and characterized by elemental analysis, conductance, IR and FAB-MS spectrum, and single crystal X-ray diffraction. In the mononuclear complex, the Ni(II) ion is coordinated with a square planar conformation by two phenolate groups and two iminic sites on one side of the macrocycle. The bond angles of O–Ni–O {85.37(19)°} and N–Ni–N {88.0(2)°} are smaller than 90°.

Graphical abstractThe mononuclear tetraazadiphenol macrocyclic nickel(II) complex [Ni(H2[20]-DCHDC)](ClO4)2 is obtained by reacting nickel perchlorate hexahydrate and a mixture of 2,6-diformyl-p-cresol with trans-1,2-diaminocyclohexane in methanol.Figure optionsDownload full-size imageDownload as PowerPoint slide