ROTATIONAL SPECTRA OF ADDUCTS OF FORMALDEHYDE WITH FREONS
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Date
2013
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The rotational spectra of three 1:1 complexes of formaldehyde (H$_{2}$CO) with freons, i.e. difluoromethane (CH$_{2}$F$_{2}$), fluorochloromethane (CH$_{2}$FCl) and trifluorochloromethane (CF$_{3}$Cl), have been observed and assigned using pulsed jet Fourier transform microwave technique. Several isotopologues (including some $^{13}$C species) have been measured in natural abundance. The tunnelling splittings have been measured in the first two adducts with relative intensity 1:3, due to the internal rotation of the formaldehyde moity along its symmetry axis. The barriers to this motion have been estimated by using a flexible model. For the latter two complexes, each of transition displays the hyperfine structures due to the quadrupolar effects of $^{35}$Cl ($^{37}$Cl) nucleus. The dissociation energy has been estimated within the pseudo-diatomic approximation for all three complexes.
Description
Author Institution: Dipartimento di Chimica "G. Ciamician" dell'Universita, Via Selmi 2, I-40126 Bologna, Italy; Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias, Universidad de Valladolid; E-47011 Valladolid, Spain; Departamento de Quimica Fisica, Facultad de Ciencia y Tecnologia, Universidad del Pais Vasco; E-48080 Bilbao, Spain