Synthesis and characterization of a nitroxide-semiquinone biradical

被引：34

作者：

Shultz, DA ^{[1
]}

Farmer, GT ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Chem, Raleigh, NC 27695 USA

来源：

JOURNAL OF ORGANIC CHEMISTRY | 1998年 / 63卷 / 18期

关键词：

D O I：

10.1021/jo980562p

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The synthesis and characterization of an anion biradical, 1(-..), composed of semiquinone and nitroxide functionalities is described. The biradical was prepared by reduction of the nitroxide-orthoquinone precursor using both electrochemical and chemical methods. The zero-field-splitting parameter, \D/hc\, for 1(-..) is consistent with the proposed electronic structure, based on a comparison to \D/hc\ of related biradicals. Finally, the results of variable-temperature EPR spectroscopy are in agreement with ferromagnetic thigh-spin) coupling of the two unpaired electrons through the m-phenylene group.

引用

页码：6254 / 6257

页数：4

共 44 条

[1] PHOTOINDUCED VALENCE TAUTOMERISM IN COBALT COMPLEXES CONTAINING SEMIQUINONE ANION AS LIGAND - DYNAMICS OF THE HIGH-SPIN [COII(3,5-DTBSQ)(2)] TO LOW-SPIN [CO-III(3,5-DTBSQ)(3,5-DTBCAT)] INTERCONVERSION
ADAMS, DM
LI, BL
SIMON, JD
HENDRICKSON, DN
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1995, 34 (13-14): : 1481 - 1483
[2] [Anonymous], MOL MAGNETIC MAT
[3] ATHERTON NM, PRINCIPLES ELECT SPI, P93
[4] BALOGH V, 1971, J ORG CHEM, V36, P1339
[5] Berson J. A., 1988, CHEM QUINONOID COMPO, V2
[6] Berson J. A., 1982, DIRADICALS
[7] NITROXIDE RADICALS .V. N,N'-DI-T-BUTYL-M-PHENYLENEBINITROXIDE A STABLE TRIPLET
CALDER, A
FORRESTE.AR
JAMES, PG
LUCKHURS.GR
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1969, 91 (14) : 3724 - &
[8] TOWARD MOLECULAR MAGNETS - THE METAL-RADICAL APPROACH
CANESCHI, A
GATTESCHI, D
SESSOLI, R
REY, P
[J]. ACCOUNTS OF CHEMICAL RESEARCH, 1989, 22 (11) : 392 - 398
[9] ORDERED BIMETALLIC RADICAL SPECIES FORMING LOW-DIMENSIONAL MAGNETIC-MATERIALS
CANESCHI, A
GATTESCHI, D
REY, P
SESSOLI, R
[J]. CHEMISTRY OF MATERIALS, 1992, 4 (01) : 204 - 209
[10] Coronado E., 1996, MOL MAGNETISM MOL AS, V321

← 1 2 3 4 5 →