METAL-COMPLEXES OF 1,2-DIAMINOBENZENE DERIVATIVES - DETERMINATION OF THE OXIDATION-STATE OF THE LIGANDS THROUGH CRYSTALLOGRAPHIC DATA

被引:48
作者
CARUGO, O
DJINOVIC, K
RIZZI, M
CASTELLANI, CB
机构
[1] UNIV PAVIA,DIPARTIMENTO GENET & MICROBIOL,SEZIONE CRISTALLOG,I-27100 PAVIA,ITALY
[2] UNIV PAVIA,DIPARTMENTO CHIM GEN,I-27100 PAVIA,ITALY
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1991年 / 06期
关键词
D O I
10.1039/dt9910001551
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The known crystal structures of metal complexes containing 1,2-diaminobenzene derivatives in the form of the benzenediamine dianion I, benzosemiquinone diimine monoanion II or neutral benzoquinone diimine III have been examined. Since the forms I-III differ both in oxidation state and structural features, a simple method is proposed to correlate the oxidation states of these ligands with their structural parameters. It thus becomes possible to deduce the oxidation state of a 1,2-diaminobenzene derivative just by considering its crystal structure. The available data indicate that the 1,2-diaminobenzene derivatives considered, once complexed to a metal ion, generally do not assume charge-localized structures, like I-III, but intermediate ones. In most cases, these forms are near to II or intermediate between II and III. The results are compared with literature oxidation-state assignments, and discussed in terms of the back-bonding ability of the ligands.
引用
收藏
页码:1551 / 1555
页数:5
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