XIII. Researches on the phosphorus-bases.—No. IX. Phospharsonium compounds

The facility with which the bromide of bromethyl-triethylphosphonium furnishes, when submitted to the action of ammonia and monamines, the extensive and well-defined group of phosphammonium-compounds, induced me to try whether similar diatomic bases containing phosphorus and arsenic might be formed by the mutual reaction between the bromethylated bromide andmonarsines . There was no necessity for entering into a detailed examination of this class of compounds. I have, in fact, been satisfied to establish by a few characteristic numbers the existence of the phospharsonium-group.Action of Triethylarsine on Bromide of Bromethyl- triethyl-phosphonium . On digesting the two substances in sealed tubes at 100°, the usual phenomena are observed; the reaction being complete after the lapse of twenty-four hours. The saline mass which is formed yields with oxide of silver in thecold , a powerfully alkaline solution, containing the hydrated oxide of ethylene-hexethylphospharsonium, C14 H36 P AsO2 = [C2 H4 )"(C2 H5 )6 P As]" } H2 }O2 .