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Titolo:
STRUCTURES OF TRIS(DONOR)-TRIS(ACCEPTOR)-SUBSTITUTED BENZENES .5. ORGANIZATION AND REORGANIZATION OF THE PI-SYSTEM IN A SYMMETRICAL TRIS(ALKYLAMINO)TRINITROBENZENE - BALANCE BETWEEN CYANINE AND QUINOID STRUCTURES
Autore:
WOLFF JJ; IRNGARTINGER H; GREDEL F; BOLOCAN I;
Indirizzi:
UNIV HEIDELBERG,INST ORGAN CHEM,IM NEUENHEIMER FELD 270 D-69120 HEIDELBERG GERMANY UNIV PLOIESTI R-2000 BUCHAREST 39 ROMANIA
Titolo Testata:
Chemische Berichte
fascicolo: 9, volume: 126, anno: 1993,
pagine: 2127 - 2131
SICI:
0009-2940(1993)126:9<2127:SOTB.O>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRYSTAL-STRUCTURES; SIGMA-COMPLEXES; MOLECULES; SUBSTITUTION;
Keywords:
CONFORMATIONAL ANALYSIS; BENZENE, DONOR-ACCEPTOR-SUBSTITUTED; BENZENE RING, DISTORTION OF; CYANINE CONCEPT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
J.J. Wolff et al., "STRUCTURES OF TRIS(DONOR)-TRIS(ACCEPTOR)-SUBSTITUTED BENZENES .5. ORGANIZATION AND REORGANIZATION OF THE PI-SYSTEM IN A SYMMETRICAL TRIS(ALKYLAMINO)TRINITROBENZENE - BALANCE BETWEEN CYANINE AND QUINOID STRUCTURES", Chemische Berichte, 126(9), 1993, pp. 2127-2131

Abstract

The pi system of la may adopt markedly different electronic structures with concomitant strong conformational preferences for the six-membered ring. Neutral 1 a can exist either in a quinoid boat form or as a twist boat, formally resulting from the coupling of an anionic with a cationic trimethine-cyanine. Deprotonation gives a rigid quinoid boat structure; protonation occurs at a ring atom to form an equally rigid cyanine.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 10:40:04