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ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 27, Number 11
BKCSDE 27(11)
November 20, 2006 |
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Title |
Synthesis and Characterization of Dinuclear Ni(II) Complexes with Tetraazadiphenol Macrocycle Bearing Cyclohexanes
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Author |
Ki Ju Kim, Duk Sang Jung, Duk Soo Kim, Chi Kyu Choi, Ki Min Park, Jong Chul Byun*
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Keywords |
Tetraazadiphenolic macrocycle, Macrocyclic nickel(II) complex, Crystal structure, Isothiocyanato ligand
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Abstract |
The dinuclear tetraazadiphenol macrocyclic nickel(II) complexes [Ni2([20]-DCHDC)]Cl2 (I), [Ni2([20]-DCHDC)](ClO4)2·2CH3CN (II(b)) and [Ni2([20]-DCHDC)(NCS)2] (III) {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} have been synthesized by self-assembly and characterized by elemental analyses, conductances, FT-IR and FAB-MS spectra, and single crystal X-ray diffraction. The crystal structure of II(b) is determined. It crystallizes in the monoclinic space group P2(1)/c. The coordination geometries around Ni(II) ions in I and II(b) are identical and square planes. In complex III each Ni(II) ion is coordinated to N2O2 plane from the macrocycle and N atoms of NCS- ions occupying the axial positions, forming a square pyramidal geometry. The nonbonded Ni…Ni intermetallic separation in the complex II(b) is 2.8078(10) A. The FAB mass spectra of I, II and III display major fragments at m/z 635.1, 699.4 and 662.4 corresponding to [Ni2([20]-DCHDC)(Cl+ 2H)]+, [Ni2([20]-DCHDC)(ClO4 + 2H)]+ and [Ni2([20]-DCHDC)(NCS) + 6H]+, respectively.
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1747 - 1751 |
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