Vibrational spectra of N-acylglycine oligomers. 1. N-acetyl derivatives and helical. dblharw.. beta. structure conversion

H Okabayashi, K Ohshima, H Etori, K Taga…

Index: Okabayashi, Hirofumi; Ohshima, Kunihiro; Etori, Hideki; Taga, Keijiro; Yoshida, Tadayoshi; Nishio, Etsuo Journal of Physical Chemistry, 1989 , vol. 93, # 18 p. 6638 - 6642

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Citation Number: 22

Abstract

N-Acetylglycine trimer, tetramer, pentamer, their potassium salts, and their N-deuterated derivatives have been prepared. Two crystalline modifications (solid-A and solid-B) have been obtained for acid-type molecules. The solid-A is more stable than the solid-B at room temperature. The solid-A Q solid-B conversion similar to the polyglycine I1 (PGII)* polyglycine I (PGI) conversion has been observed. The X-ray powder patterns and the ...