Cation-exchange chromatography and selective complexation in the isolation of branched acyclic polyamines : Syntheses of Ethylidynetris(methanamine) [tame], 2,2-Bis(aminomethyl)propan-1-ol [hmmp], 4,4',4''-Ethylidynetris(3-azabutan-1-amine) [sen] and 5,5',5'-Ethylidynetris(4-azapentan-1-amine) [stn]
The chiral form of the title complexion, [Co(stn)]3+, has been found to racemizethermally both in the solid state and in solution, and the racemization rates have been measured. The structure of [Co(stn)]Cl3·3.5H2O has been determined and used to discuss the origin of this facile racemization.