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Titolo:
RATE CONSTANTS FOR THE RELAXATION OF CH(X(2)PI,NU=1) BY CO AND N-2 ATTEMPERATURES FROM 23 TO 584 K
Autore:
HERBERT LB; SIMS IR; SMITH IWM; STEWART DWA; SYMONDS A; CANOSA A; ROWE BR;
Indirizzi:
UNIV BIRMINGHAM,SCH CHEM,POB 363 BIRMINGHAM B15 2TT W MIDLANDS ENGLAND UNIV RENNES 1,DEPT PHYS ATOM & MOL,UA 1203 CNRS F-35042 RENNES FRANCE
Titolo Testata:
Journal of physical chemistry
fascicolo: 36, volume: 100, anno: 1996,
pagine: 14928 - 14935
SICI:
0022-3654(1996)100:36<14928:RCFTRO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
NEUTRAL-NEUTRAL REACTIONS; INDUCED FLUORESCENCE MEASUREMENTS; POTENTIAL-ENERGY SURFACES; OH RADICALS; REACTION CH(X2-PI)+N2(X1-SIGMA-G+)->HCN(X1-SIGMA+)+N(4S); VIBRATIONAL-RELAXATION; ELEMENTARY REACTIONS; ROOM-TEMPERATURE; KINETICS; NO;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
59
Recensione:
Indirizzi per estratti:
Citazione:
L.B. Herbert et al., "RATE CONSTANTS FOR THE RELAXATION OF CH(X(2)PI,NU=1) BY CO AND N-2 ATTEMPERATURES FROM 23 TO 584 K", Journal of physical chemistry, 100(36), 1996, pp. 14928-14935

Abstract

Rate constants have been determined for the collisional relaxation ofCH(X(2) Pi,nu = 1) by CO and N-2 over a wide range of temperatures. Experiments between 584 and 86 K have been performed in heated and cryogenically cooled cells, and rate constants from 295 to 23 K have been measured in a CRESU (cinetique de reaction en ecoulement supersonique uniforme) apparatus. In both series of experiments, pulsed laser photolysis was employed to generate CH radicals and the laser-induced fluorescence technique was used to observe the rate of removal of CH(nu = 1). Vibrational relaxation is rapid, k(298) = 9.7 x 10(-11) cm(3) molecule(-1) s(-1) for CO and k(298) = 3.1 x 10(-11) cm(3) molecule(-1) s(-1) for N-2, and the dependence of the rate constants on temperature isquite slight but complex. The results suggest that relaxation occurs via strongly bound complexes, and the implications of the results for the interpretation of the reactions between CH radicals and CO and N-2are discussed.

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Documento generato il 23/11/20 alle ore 21:35:12