ISSN:
1022-1352
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
We are presently studying n,3 nylons, which have an unusual hydrogen bonding system. In order to determine their structure with greater precision, we have synthesized and determined by X-ray diffraction the structure of a dimer of the repeating unit of nylon 4,3, namely, 1,4-bis(propylaminomalonylamino)butane (pMBMp). This compound crystallizes in the triclinic system, space group P1 with a = 4,65, b = 4,91, c = 24,47 Å; α = 85,3, β = 89,7 and γ = 61,9°. The malonyl residues of pMBMp are related by an inversion center, with torsional angles about the methylene bonds of each malonyl residue in the range 110-115° (or the equivalent negative values). A. conformation TS̄(T)3ST was found for the butylenediamide unit. These results give support to the crystalline structure proposed for nylons n,3.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1995.021960722
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