MATRIX-ISOLATED BINARY AND TERNARY COMPLEXES FORMED IN PHOTOCHEMICAL DECOMPOSITION OF FORMIC-ACID ANHYDRIDE

Citation
J. Lundell et M. Rasanen, MATRIX-ISOLATED BINARY AND TERNARY COMPLEXES FORMED IN PHOTOCHEMICAL DECOMPOSITION OF FORMIC-ACID ANHYDRIDE, Journal of physical chemistry, 97(38), 1993, pp. 9657-9663
Citations number
42
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Physical
ISSN journal
0022-3654
Volume
97
Issue
38
Year of publication
1993
Pages
9657 - 9663
Database
ISI
SICI code
0022-3654(1993)97:38<9657:MBATCF>2.0.ZU;2-K
Abstract
Primary dissociation pathways of formic acid anhydride have been inves tigated in low-temperature argon matrices. Strong indications were fou nd for the photodecomposition product dependence upon the conformation of the precursor: the most stable conformer yields complexes between formic acid and carbon monoxide, whereas the higher energy species yie ld ternary complexes composed of the primary monomers, H-2, CO, CO2, a nd H2O. Infrared spectra and vibrational assignments for the complexes are given. The OH torsional and stretching modes of formic acid are s ubstantially perturbed upon complexation. Also, the asymmetric stretch ing mode of H2O in the ternary complex H2O + 2CO is markedly coupled t o the librational motion of CO in solid argon. The possibility of trap ping cis-formic acid trapped as a decomposition product is discussed.