Adipyl dichloride

When, for example, piperazine, ethylene glycol, phosgene, and adipyl dichloride are simultaneously polycondensed, a copolymer with a more or less random distribution of monomeric units is produced. In this case, however, the sequence of monomeric units is still regulated by the fact that a B monomeric unit (carbonic acid or adipic acid) can only be followed by an A monomeric unit (piperazine or ethylene glycol). 

Another relatively simple kind of OA polyamide is described by Schulz et al [38] who report on the interfacial polycondensation of /-lysine with adipyl dichloride. The dependence of rotation on pH is considered to be due only to the degree of ionization of the free carboxyl group along the polyamide chain rather than to conformational changes. 

A series of simple OA polyamides is described by Hamoud et al [42]. These polymers were obtained in our laboratory by interfacial polycondensation of (+)-, and diaminopropane with succinyl, adipyl and sebacyl dichloride. With ClCO(CH2) COCl when the number of methylene residues n increased from 4 to 6 and 8, the yield of polymer increased from 2% to 40% and 95%. The anomalous chiroptical properties in the presence of various divalent salts have been investigated by Le Bris et al [43] they are further detailed by Dr Vert in his Chapter. 

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