EXTRAORDINARY COORDINATION OF ACETONITRILE TO SQUARE-PLANAR, 1,4,8,11-TETRAAZACYCLOTETRADECANENICKEL(II) AND (1R,4R,8S,11S)-1,4,8,11-TETRAMETHYL-1,4,8,11-TETRAAZACYCLOTETRADECANENICKEL(II) CATIONS

被引：10

作者：

YOKOYAMA, T ^{[1
]}

IWAMOTO, E ^{[1
]}

KUMAMARU, T ^{[1
]}

机构：

[1] HIROSHIMA UNIV, FAC SCI, DEPT CHEM, NAKA KU, HIROSHIMA 730, JAPAN

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1991年 / 64卷 / 02期

关键词：

D O I：

10.1246/bcsj.64.464

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Coordination of dipolar aprotic solvents to the square-planar complexes of nickel(II) was investigated in nitrobenzene (NB) spectrophotometrically. Compared with N,N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO), it was observed that acetonitrile (AN) was strongly coordinated to [NiL]2+ (L = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane). The stepwise coordination constants K(NiS1) and K(NiS2) (mol-1 dm3) for (1R,4R,8S,11S)-[NiL]2+ were found to be (1.6, 0.5), (1.0, 0.1), (3.4, 6.7), and (0.4, 1.9) for DMSO, DMF, AN, and benzonitrile, respectively. The K(NiS2) values for nitriles are larger than the K(NiS1) values, showing that nitriles are coordinated to the metal ion through pi-back donation.

引用

页码：464 / 468

页数：5

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