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Chloroform Infrared Multiphoton Dissociation in the Presence of O 2 and NO 2 ¶
Author(s) -
Freytes V. Mariana,
Codnia Jorge,
Azcárate M. Laura
Publication year - 2005
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.2005.tb01444.x
Subject(s) - infrared multiphoton dissociation , chemistry , dissociation (chemistry) , photochemistry , infrared , catalysis , infrared spectroscopy , organic chemistry , physics , optics
The infrared multiphoton dissociation (IRMPD) of CDCl 3 in the presence of O 2 and NO 2 as acceptor gases has been studied. We have worked with both pure CDCl 3 and mixtures with CHCl 3 . The reaction mechanism following IRMPD of CDCl 3 is discussed in detail. CCl 2 O, CCl 4 and DCl were found to be the main products. With added O 2 , the observed CDCl 3 dissociation was larger than with nonoxygenated acceptor gases. The reaction mechanism probably involves a catalytic cycle initiated by the oxidation of CCl 3 . With the aim of discriminating the different CDCl 3 dissociation mechanisms, the IRMPD of CDCl 3 in the presence of NO 2 was first studied. In order to make evident the CDCl 3 dissociation produced by the catalytic cycle, we then studied the IRMPD of CDCl 3 in mixtures with CHCl 3 with O 2 as the acceptor gas. In this case, the dissociation mechanism subsequent to IRMPD is evidenced in the competence between the two isotopic species.