SYNTHESIS, STRUCTURE, AND SPECTROSCOPY OF AN ENCAPSULATED NICKEL(II) COMPLEX OF THE UNSYMMETRICAL MACROBICYCLIC LIGAND 1-METHYL-8-AMINO-3,13-DITHIA-6,10,16,19-TETRAAZABICYCLO[6.6.6]ICOSANE (AMN(4)S(2)SAR)

被引：18

作者：

DONLEVY, TM ^{[1
]}

GAHAN, LR ^{[1
]}

STRANGER, R ^{[1
]}

KENNEDY, SE ^{[1
]}

BYRIEL, KA ^{[1
]}

KENNARD, CHL ^{[1
]}

机构：

[1] UNIV QUEENSLAND,DEPT CHEM,BRISBANE,QLD 4072,AUSTRALIA

来源：

INORGANIC CHEMISTRY | 1993年 / 32卷 / 26期

关键词：

D O I：

10.1021/ic00078a020

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The nickel(II) complex of the encapsulating ligand 1-methyl-8-amino-3,13-dithia-6,10,16,19-tetraazabicyclol[6.6.6]-icosane, [Ni(AMN(4)S(2)sar)](2+), is reported. Crystals of the complex are monoclinic, space group P2(1)/c, with Z = 4, a = 9.167(6) Angstrom, b = 19.885(4) Angstrom, c = 13.068(8) Angstrom, beta = 95.37(3)degrees, and R = 0.055. The low-temperature (similar to 10 K) Single-crystal absorption spectrum and ligand field analysis of the complex are reported. The spin-forbidden (3)A(2g) --> (1)E(g),(1)A(1g) transitions were observed at low temperature, and from the spectroscopic analysis, a significant differential nephelauxetic effect is shown to occur resulting in much lower values for the Racah B and C parameters for these spin-forbidden transitions in relation to the spin-allowed transitions.

引用

页码：6023 / 6027

页数：5

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