Abstract:
The interaction of carbon dioxide with tin has been investigated spectro-photometrically. Evidence has been found for physicosorption and chemisorption of carbon doxide on tin together with partial dissociation of carbon dioxide molecules into carbon monoxide and oxygen. This is accompanied by the successive formation of two different types of carboxylates (1580, 1405 cm` ), and (1815 cm 1) which is assigned to carboxylate, linear type (polar adsorption of carbon dioxide), or to the dissociative adsorption of carbon dioxide; oxide (650, 418 cm-1); bridged (1840 cm-1), linear (i.e. II-bonded to tin) carbonyl (1895 cm-1); and terminal carbxiyl (2050 cm-1). An increase of time of contact of carbon dioxide gas with tin sample to two hr led to the disappearance of the 1815 cm-1 band with the simultaneous appearance of 1645, 1470, and 1240 cm-` bands in addition to the 3620 cm-` band characteristific of a bicarbonate species. Heating the sample at a temperature of 1509 in carbon dioxide for three hours led to the disappearance of the previously mentioned species and the appearance of absorption bands characteristic of a bridged carbonate species (1810, 1195, 785 cm-1). The relationship between these differentspecies has been explained.
Page(s):
236-243
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 22, Issue: 5, Year: 1979