1.3- diaminopropane ligand isomer complex

Figure 7 (a) 1,3-diaminopropane and (b) 1,2-diaminopropane ligand isomer complexes. 

Carboxamides containing alkylamine arms like (34), synthesized from dialkylmalonate and ethylene-diamine, act as chelating dianionic N4-donors,44,45 whereas the geometric isomer (35) was prepared from 1,3-diaminopropane and chloroacetyl chloride.46 The hexadentate bis(pyrazine)-carboxamides (36) and (37) can be obtained by the addition of 1,3-propanediamine to the appropriate carboxylic acid.47 Compound (36), in the dianionic form, can be used to obtain homo- and hetero-metal bridged complexes, whereas (37) has been shown to yield tetranuclear copper(II) complexes involving opened-up dianionic ligand molecules.47... 

Ligand exchange reactions in octahedral carbonyl complexes often involve five-coordinate intermediates (see Chapter 1) and these species may be fluxional on the time-scale of the reaction. Square-pyramidal [W(CO)4(PPhs)] formed in the reaction of [W(CO)4(tmpa)l (tmpa= VWW -tetramethyl-l,3-diaminopropane) with PPhg is fluxional, but the most stable isomer probably contains an equatorially bonded... 

---