Crystal structure and conformation of N-(t-butoxycarbonyl)-L-isoleucyl-L-alanine benzylester期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Crystal structure and conformation of N-(t-butoxycarbonyl)-L-isoleucyl-L-alanine benzylester

Authors:	N. Sukumar M. N. Ponnuswamy R. Jayakumar

Affiliation:	(1) Department of Crystallography and Biophysics, University of Madras, Guindy campus, 600 025 Madras, India;(2) Chemical Laboratory, Central Leather Research Institute, 600 020 Adyar, Madras, India

Abstract:	C₂₂N₂O₅H₃₂,M_r=404.5, monoclinic,C2,a=21.781(5),b=5.065(1),c=22.333(4)Å,=112.81(2)°,V=2271.1(9)Å³,D_calc=1.148 g cm³, (CuK)=1.5418 Å,=5.89 cm^–1,F(000)=848, room temperature,R=0.058 for 2178 unique reflections [I2.5(I)]. The peptide linkage is in thetrans conformation. The molecule adopts the-sheet structure. The crystal structure is stabilized by a three-dimensional network of N-HO and C-HO hydrogen bonds.DCB Contribution No. 813.

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