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Methylene chloride‐soluble and insoluble ureines An X‐ray diffraction, infrared absorption, and proton magnetic resonance study

 

作者: CLAUDIO TONIOLO,   GIOVANNI VALLE,   GIAN MARIA BONORA,   MARCO CRISMA,   VITTORIO MORETTO,   JAN IZDEBSKI,   JACEK PELKA,   DANUTA PAWLAK,   CONRAD H. SCHNEIDER,  

 

期刊: International Journal of Peptide and Protein Research  （WILEY Available online 1988）
卷期: Volume 31, issue 1  

页码: 77-85

 

ISSN:0367-8377

 

年代: 1988

 

DOI:10.1111/j.1399-3011.1988.tb00009.x

 

出版商: Blackwell Publishing Ltd

 

关键词: peptides;interaction with ureines;self‐association and solubility of;effect of ureines on;ureines;intermolecular interactions of;X‐ray diffraction structure of

 

数据来源: WILEY

 

摘要:

An X‐ray diffraction study has been carried out on single crystals of two symmetrical ureines (N,N′‐diiopropylurea and the familiarN,N′‐dicyclohexylurea) and one unsymmetrical ureine (N‐tert.‐butyl.N′‐methylurea). The presence/absence of intermolecular H‐bonds in the crystal state has been compared to the situation assessed in solution by1H n.m.r. It was shown by i.r. absorption that soluble ureines may disrupt intermolecular (peptide)N—H‐ O=C(peptide) H‐bonds in methylene chloride, a point of practical interest, particularly in soli

 

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