Coordination Compounds of Olefins With Solid Complex Silver Salts: I. Coordination Compounds With Anhydrous Silver Fluoborate

Interaction of solid silver fluoborate with the gaseous olefins ethylene, propylene, and the four butenes has been observed to provide 12 new stoichiometric solid coordination compounds (silver fluoborate – olefin complexes) of high stability. Experimental investigation of the univariant pressure–temperature stability lines for the complexes has been made and the thermodynamic functions calculated: the heat content change for complex dissociation is between 9 and 13 kcal/mole of olefin liberated. Infrared spectra of the complexed olefins indicate that the strength of the silver–olefin bond is primarily dependent upon the basicity of the olefin and a comparison of the thermodynamics of dissociation shows anomalous behavior on the part of isobutylene and trans-2-butene as compared with the regularity displayed by the other four olefins.