An improved synthesis of 1,2,3-triaminopropane: X-ray structure of s-fac-bis(1,2,3-triaminopropane)cobalt(III) chloride

A convenient synthesis of 1,2,3-triaminopropane (ptn) has been achieved by the reduction of 1,2,3-triazidopropane. The triamine ptn gives a cobalt(III) complex [Co(ptn)2]Cl3, which has been characterised by 13C n.m.r. and X-ray analysis. The crystals are monoclinic, space group C2/c, with a= 12.511(2), b= 8.196(1), c= 14.580(2)Å, β= 113.19(2)°, and Z= 4. 1 506 Unique observed reflections [l > 3σ(l)] have been used to solve and refine the structure down to R 0.0264.