Abstract

In a previous paper, Segal and Eggerton (5) presented infrared spectra of aliphatic normal mono-amines and alpha-omega diamines obtained from CCl₄ solution and KBr discs. Although preparation of the specimens for the KBr spectra was carried out in a CO₂-free atmosphere, the discs were exposed to the laboratory atmosphere during the recording of the spectra. Because the results of later experiments with hexamethylenediamine (HMDA), both in solution and in the solid state, showed that this diamine reacts with atmospheric carbon dioxide much more rapidly than it was thought to <i>(4)</i>, considerations arose of possible carbonate formation at the surfaces of the KBr disc. Closer study of the KBr spectrum of HMDA (see Segal and Eggerton <i>(5)</i>, Figure 4, curve <i>5</i>) did indeed disclose the 6.90-micron (1449 cm⁻¹) and 11.37-micron (879 cm⁻¹) ionic carbonate bands and several ands due to -NH₃⁺. This evidence is not readily apparent in the KBr spectra of the other diamines.

The Infrared Transmittance of Carbon Dioxide

V. Robert Stull, Philip J. Wyatt, and Gilbert N. Plass
Appl. Opt. 3(2) 243-254 (1964)

Dispersion of Carbon Dioxide*

J. G. Old, K. L. Gentili, and E. R. Peck
J. Opt. Soc. Am. 61(1) 89-90 (1971)

Light Production in the Aluminum-Oxygen Reaction

T. H. Rautenberg and P. D. Johnson
J. Opt. Soc. Am. 50(6) 602-606 (1960)

Optical constants of carbon dioxide ice

Stephen G. Warren
Appl. Opt. 25(16) 2650-2674 (1986)

Total Absorptance of Carbon Dioxide in the Infrared

Darrell E. Burch, David A. Gryvnak, and Dudley Williams
Appl. Opt. 1(6) 759-765 (1962)