“…Gibson, Harley-Mason, Litherland, and Mann (63) have reported the transformations undergone by the hydrochlorides of tetrakis(methylaminomethyl)methane, C (CH2NHCH3)4, and tetrakis(dimethylaminomethyl)methane, C[CH2N (CH3)2]4, on heating. The tetrahydrochloride of the tetramethyl base when heated to just above its melting point decomposes to give the dihydrochloride of 1,3-bis(methylamino)propane (XXIII).…”