1.3- Diaminopropane, ligand structure

Fig. 17. Structure of the dinuclear Zn complex with iV,iV,iV, iV -tetrakis[(2-p3rridyl)-methyl]-2-hydroxy-l,3-diaminopropane ligands (16).

Other polydentate ligands are polyamines and related ligands. Stability constants of silver(I) complexes with polyamines in dimethyl sulfoxide,419 A-methyl-substituted 4-methyldiethylene-triamines,420 or ethylene- or N- or C-methylated ethylenediamine in aqueous solution have been reported.421 The structure of the silver 1,3-diaminopropane complex, [Ag NH2(CH2)3NH2 ]-C104,422 and complex formation with 1,4-diaminobutane and 1,5-diaminopentane have been reported.423 A dinuclear silver(I) compound with ethylenediamine [(enH)Ag(en)Ag(enH)2]4+ has... 

The potentially six-coordinate ligands (edta)4- and (pdta)4" (H4edta = N,N,N, N tetrakis(2-ethanoic acid)-l,2-diaminoethane, H4pdta = N,N,N, iV -tetrakis(2-ethanoic acid)-1,2-diaminopropane) add to dimeric molybdenum(V) centres to form complexes such as [Mo202Y2(edta)]2- and [Mo02Y2(pdta)]2- (Y = O, S) 425-429 The structure of... 

It was obvious to chemists in the early twenties that an extension of Werner s ideas into compounds with polydentate ligands involved the syntheses of suitably constituted, organic substances. Among these were the higher homologs of aliphatic amines related structurally to 1, 2-diaminoethane (en), dH, 2-diaminopropane (pn), and 1, 3-diaminopropane (tn). Efficient synthetic routes to these long-chain bases were at best tedious and frequently very difficult with conventional laboratory equipment. 

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