Matrix isolation studies of carbonyl selenide, OCSe: Evidence of the formation of dimeric species, (OCSe)2

JOVANNY A. GÓMEZ CASTAÑO; ROSANA M. ROMANO

VIBRATIONAL SPECTROSCOPY

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2014 vol. 70 p. 28 - 35

0924-2031

OCSe isolated in solid Ar or N2 at 10 K was investigated by FTIR spectroscopy. The IRspectra of OCSe diluted in a 1:1000 proportion with the matrix gases were interpreted interms of monomeric carbonyl selenide in a single matrix site. The IR spectra of moreconcentrated matrices revealed several new IR absorptions, which were tentativelyassigned to different dimeric structures, aided by the prediction of quantum chemicalcalculations. The different matrices were exposed to UV-visible broad-band radiation,finding that monomeric OCSe decomposes into CO and Se, as evidenced by the IRabsorption of CO perturbed by the presence of a selenium atom in the same matrix cage,while dimeric forms of OCSe decompose giving mainly (CO)2.