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Model compounds of nylons—I. The crystal structure of N,N′-Diethyladipamide

✍ Scribed by Ettore Benedetti; Maria Rosaria Ciajolo; Paolo Corradini

Publisher
Elsevier Science
Year
1973
Tongue
English
Weight
428 KB
Volume
9
Category
Article
ISSN
0014-3057

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✦ Synopsis

The conformation of the molecule of N,N'-diethyladipamide (NNDEA) has been investigated in the crystalline state by X-ray analysis. NNDEA crystallizes in the monoclinic system, space group P21/c with a = 13'76(2), b = 4.90( 1), e = 8'99(2) A and fl = 92"0°(1). 661 independent non-zero reflections collected by counter techniques with CuK~ were used in the refinement to the final value of R = 7.6 per cent. The conformation of the adipic acid moiety shows a succession of carbon-carbon bonds (from one carbonyl group to the other) of the type skew (+), gauche (--), trans, gauche (+), skew (--).

Analogous conformations (instead of the all-tram planar) may be present as point or linear defects in the crystals of nylon 6-6.

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