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Titolo:
STRUCTURAL INFORMATION FROM METHYL INTERNAL-ROTATION SPECTROSCOPY
Autore:
SPANGLER LH;
Indirizzi:
MONTANA STATE UNIV,DEPT CHEM BOZEMAN MT 59717
Titolo Testata:
Annual review of physical chemistry
, volume: 48, anno: 1997,
pagine: 481 - 510
SICI:
0066-426X(1997)48:<481:SIFMIS>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR JET SPECTROSCOPY; INTRAMOLECULAR VIBRATIONAL REDISTRIBUTION; NONRIGID AROMATIC-MOLECULES; EXCITED ELECTRONIC STATES; TRANS-STILBENE; CONFORMATIONAL PREFERENCES; TORSIONAL BARRIERS; SUPERSONIC JETS; P-FLUOROTOLUENE; TRIPLET-STATES;
Keywords:
METHYL ROTORS; STILBENES; METHYL TORSION; NONRIGID MOLECULES;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
52
Recensione:
Indirizzi per estratti:
Citazione:
L.H. Spangler, "STRUCTURAL INFORMATION FROM METHYL INTERNAL-ROTATION SPECTROSCOPY", Annual review of physical chemistry, 48, 1997, pp. 481-510

Abstract

The fundamental quantum mechanics, group theory, and spectroscopy of methyl torsional structure accompanying electronic transitions is presented. The origin of barriers to internal rotation and the interactionof the methyl with the pi system via hyperconjugation are discussed. Because of the relationship between the methyl barrier and the pi system, measurement of the CH3 properties provides structural information about the molecule. In para'-substituted p-methyl-t-stilbenes, barriers in the S-1 state show a strong dependence on the substituent, substituent conformation, and involvement of the substituent in hydrogen bonding interaction. The methyl torsional barrier reflects these changes despite the distance of the substitution site, 10 atoms away.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 13:37:07