NOTES
A n Infrared Study of Complexes of Ethylamine with Ethylammonium and Copper Ions in Montmorillonite'
by V. C. Farmer and M. M. Mortland Soil Science Department, Michigan State University, East Lansing, Michigan (Received July 10, 1964)
In the course of investigations on the nature of the interactions between nitrogenous compounds and soil clays, Mortland and Barake2 noted that the infrared spectrum of ethylamine adsorbed from the vapor on hydrogen montmorillonite differed markedly from that of ethylammonium ions introduced into montmorillonite by exchange from solution. To elucidate the cause of these differences, a study has been made of the products formed when ethylamine is adsorbed on films of ethylammonium and copper montmorillonite; adsorption of ethylamine on hydrogen and calcium montmorillonite2has also been re-examined. Experimental Montmorillonite H-25 from Upton, Wyo., supplied by Ward's Natural Science Establishment was used in this work. Homoionic clays were prepared by treating the
