NO release from trans-[Ru(NH3)4L( NO)]3+ complexes upon reduction (L=1-methylimidazole or benzoimidazole)

被引：15

作者：

Holanda, AKM ^{[1
]}

Pontes, DL ^{[1
]}

Diógenes, ICN ^{[1
]}

Moreira, IS ^{[1
]}

Lopes, LGF ^{[1
]}

机构：

[1] Univ Fed Ceara, Dept Quim Organ & Inorgan, BR-60455960 Fortaleza, Ceara, Brazil

来源：

TRANSITION METAL CHEMISTRY | 2004年 / 29卷 / 04期

关键词：

D O I：

10.1023/B:TMCH.0000027458.80926.3c

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis, characterization and reactivity of trans-[Ru(NH3)(4)(L) NO](PF6)(3) (L = benzoimidazole or 1-methylimidazole in trans position to NO) are presented. H-1-n. m. r. spectroscopy data indicate that the benzoimidazole and 1-methylimidazole ligands are coordinated to Ru-II through carbon and nitrogen, respectively. The nitrosyl stretching frequencies [nu(NO) > 1900 cm(-1)] suggest that the coordinated nitrosyl has substantial NO+ character. The complexes undergo a single-electron reduction (E-0 approximate to - 0.245 versus NHE), which involves the coordinated nitrosyl. Dissociation of NO in the reduced species is facilitated by the 1-methylimidazole ligand, which is not observed for the benzoimidazole species. The complex with 1-methylimidazole does not suffer hydroxide attack on the NO+, at least at pH values lower than 11.

引用

页码：430 / 436

页数：7

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