METAL-NITROXYL INTERACTIONS .16. DIPOLAR AND EXCHANGE INTERACTIONS IN FROZEN-SOLUTIONS

被引:9
作者
EATON, SS
DUBOIS, DL
BOYMEL, PM
EATON, GR
机构
[1] UNIV DENVER,DEPT CHEM,DENVER,CO 80208
[2] UNIV COLORADO,DEPT CHEM,DENVER,CO 80202
关键词
D O I
10.1021/j100489a004
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Resolved electron spin-electron spin coupling has been observed in the EPR spectra of frozen solutions of copper complexes with ligands which contain nitroxyl radicals. The magnitude of the EPR splitting is too large to be accounted for by dipolar interactions. It is concluded that exchange interactions contribute to the observed splittings. Consequently caution should be exercised in calculating metal-nitroxyl distances based on EPR spectra. © 1979 American Chemical Society.
引用
收藏
页码:3323 / 3324
页数:2
相关论文
共 16 条
[1]   INTERPRETATION OF ELECTRON-SPIN RESONANCE-SPECTRA DUE TO SOME B12-DEPENDENT ENZYME-REACTIONS [J].
BOAS, JF ;
HICKS, PR ;
PILBROW, JR ;
SMITH, TD .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1978, 74 :417-431
[2]   METAL-NITROXYL INTERACTIONS .2. RESOLVED WEAK EXCHANGE ELECTRON-PARAMAGNETIC RESONANCE-SPECTRUM IN SOLUTION [J].
BOYMEL, PM ;
CHANG, JR ;
DUBOIS, DL ;
GREENSLADE, DJ ;
EATON, GR ;
EATON, SS .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1977, 99 (16) :5500-5502
[3]  
BOYMEL PM, UNPUBLISHED
[4]   EPR DETERMINATION OF CO(II)-FREE RADICAL MAGNETIC GEOMETRY OF DOUBLET SPECIES ARISING IN A COENZYME B-12-ENZYME REACTION [J].
BUETTNER, GR ;
COFFMAN, RE .
BIOCHIMICA ET BIOPHYSICA ACTA, 1977, 480 (02) :495-505
[5]  
CARRINGTON A, 1967, INTRO MAGNETIC RESON, P32
[6]  
CHIGNELL CF, 1975, J BIOL CHEM, V250, P5622
[7]   METAL-NITROXYL INTERACTIONS .9. ELECTRON-ELECTRON COUPLING IN THE COPPER COMPLEX (3-(N-(2,2,5,5-TETRAMETHYLPYRROLIN-3-YL-1-OXY)AMIDO)-4,10-DIMETHYL-5,9-DIAZATRIDECA-4,9-DIENE-2,12-DIONE)COPPER(II) [J].
DUBOIS, DL ;
EATON, GR ;
EATON, SS .
INORGANIC CHEMISTRY, 1979, 18 (01) :75-79
[8]   METAL-NITROXYL INTERACTIONS .5. INTERACTION OF SPIN LABELS WITH TRANSITION-METALS [J].
EATON, SS ;
EATON, GR .
COORDINATION CHEMISTRY REVIEWS, 1978, 26 (03) :207-262
[9]   METAL-NITROXYL INTERACTIONS .6. ANALYSIS OF EPR-SPECTRA OF SPIN-LABELED COPPER-COMPLEXES [J].
EATON, SS ;
DUBOIS, DL ;
EATON, GR .
JOURNAL OF MAGNETIC RESONANCE, 1978, 32 (02) :251-263
[10]  
JOST P, 1971, METHODS PHARMACOLOGY, V2, P242