 In this report a phosphonium-borate species was observed to undergo the thermal loss of a H2 molecule, to generate the phosphine and the borane.The phosphonium-borate species 1 was prepared from B(C6F5)3 and (C6H2Me3)2PH, due to the steric demands of both of these molecules a traditional adduct could not be formed and the zwitterionic phosphonic-boronate was prepared [Figure 1].A “H-for-F exchange” was carried out to give 2 which was stable to moisture and air.