The Ultraviolet Absorption of Pure Cyclopropane and Propylene; their Preparation and Boiling Points

Abstract

The ultraviolet absorption of cyclopropane hydrocarbons, is similar to that of the saturated aliphatic Cambridge, Mass.

Spectroscopy of Organic Molecules in the Vacuum Ultraviolet

“…A platinum photo-cell is now advertised commercially. 4 It is reported as sensitive below 2100A to whatever limit is imposed by a window "a few microns thick" of a special ultraviolettransmitting glass. ** The advent of this cell may make the general construction of vacuum spectrophotometers for this region more feasible.…”

Application of Low Temperatures to Chemical Research.

“…Two quantities which can be calculated from the surface tension are of interest. The molecular surface energy is given by the equation of Ramsay and Shields y{VM)2!i = K(TC -T -6) (7) (where y is the surface tension, VM the molecular volume, and Te the critical temperature) from which it is seen that the molecular surface energy is proportional to the temperature. The proportionality constant K is about 2 for nonassociated liquids, which have little surface orientation; for associated liquids, K is lower.…”

“…Ashdown, Harris, and Armstrong have found continuous absorption in the ultraviolet for liquid propylene and cyclopropane at -78°C. (7,86).…”