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Polymorphism in Ethyl Esters of N ‐Acetylglycine Oligomers. A Study by Vibrational Spectroscopy
Author(s) -
Etori Hideki,
Taga Keijiro,
Watanabe Kazuya,
Yoshida Tadayoshi,
Okabayashi Hirofumi
Publication year - 1997
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/(sici)1097-4555(199705)28:5<363::aid-jrs105>3.0.co;2-k
Subject(s) - pentamer , trimer , random hexamer , chemistry , raman spectroscopy , crystallography , polymorphism (computer science) , polymer chemistry , organic chemistry , biochemistry , dimer , physics , optics , gene , genotype
Ethyl esters of N ‐acetylglycine oligomers from the trimer to nonamer were prepared and vibrational spectra in the solid state were measured. Vibrational band assignments were made on the basis of the assignments for polyglycine I, polyglycine II and N ‐acetylglycine oligomers. For ethyl esters of N ‐acetylglycine from the trimer to pentamer, a structure similar to that of polyglycine II was obtained. For the hexamer and longer oligomers, structural transformations similar to those for polyglycine I and polyglycine II was observed. X‐ray powder diffraction patterns were also measured to confirm the structures of these oligomers. © 1997 by John Wiley & Sons, Ltd.