THE PH-DEPENDENT SYNTHESIS AND STRUCTURAL STUDY OF DIMER AND CYCLIC TRIMER COMPLEXES OF 9-METHYLHYPOXANTHINE OR 9-ETHYLHYPOXANTHINE NUCLEOBASES WITH (ETA(5)-PENTAMETHYLCYCLOPENTADIENYL)RHODIUM AQUA COMPLEXES

被引：62

作者：

CHEN, H

OLMSTEAD, MM

SMITH, DP

MAESTRE, MF

FISH, RH

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[2] UNIV CALIF DAVIS,DEPT CHEM,DAVIS,CA 95616

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1995年 / 34卷 / 13-14期

关键词：

COMPLEXES WITH NITROGEN LIGANDS; COORDINATION; NUCLEOBASES; RHODIUM COMPOUNDS;

D O I：

10.1002/anie.199515141

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

η 1(N1)‐ and η2(N7,O6)‐coordination of the Rh atoms by 9‐ethylhypoxanthin (9‐EH) is evident in the cyclic trimer 1 (see picture). This is formed from [(C5Me5RhCl2)2], AgOSO2CF3, and 9‐EH in water at pH 6.1. An entirely different coordination arises at pH 10.2 for the complex with the ligand 9‐methyl‐hypoxanthin (9‐MH): in the dimer 2 the metal atoms are η1(N1)‐coordinated. The formation of dramatically different structures at various pH values could be explained by the changes in the nucleophilicity of the N7, O6, and N1 binding sites. (Formula Presented.) (Figure Presented.) Copyright © 1995 by VCH Verlagsgesellschaft mbH, Germany

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页码：1514 / 1517

页数：4

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