AQUEOUS ELECTROCHEMISTRY OF MONONUCLEAR AND BINUCLEAR COPPER(II) COMPLEXES WITH POLYAZA[N]PARACYCLOPHANE LIGANDS

被引：20

作者：

DOMENECH, A ^{[1
]}

FOLGADO, JV ^{[1
]}

GARCIAESPANA, E ^{[1
]}

LUIS, SV ^{[1
]}

LLINARES, JM ^{[1
]}

MIRAVET, JF ^{[1
]}

RAMIREZ, JA ^{[1
]}

机构：

[1] UNIV JAUME 1,DEPT EXPTL SCI,ORGAN CHEM LAB,E-12080 CASTELLO DE PLANA,SPAIN

来源：

JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1995年 / 04期

关键词：

D O I：

10.1039/dt9950000541

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The aqueous electrochemistry of the Cu2+ complexes of the azaparacyclophanes 2,6,9,13-tetraaza[14]paracyclophane (L1), 2,5,8,11-tetraaza[12]paracyclophane (L2) and 2,5,8,11,14-pentaaza[15]paracyclophane (L3) has been studied. Copper(II) forms stable mononuclear [CuH,L](2+r)+ species with all three ligands (r = -1 to 1, L1 and L2; -1 to 2, L3) while L2 and L3 also form binuclear [Cu2H(r)L](4+r)+ species (r = -2, L2; 0 to -2, L3) in a pH-dependent stepwise manner. Frozen-solution ESR measurements show that all the complexes prefer a square-planar co-ordination. In neutral and basic media reduction at mercury and glassy carbon electrodes occurs in two quasi-reversible steps, indicating the formation of stable Cu+ species. Stabilization of the Cu+ complexes with respect to disproportionation in the order L3 > L1 > L2 has been found.

引用

页码：541 / 547

页数：7

共 29 条

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