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Kristallstruktur eines überbrückten 1,2,3‐Oxadiazolidin‐5‐ons
Author(s) -
Bieri Jost H.,
Meier Hansruedi,
Heimgartner Heinz
Publication year - 1978
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19780610319
Subject(s) - chemistry , orthorhombic crystal system , crystal structure , intramolecular force , crystallography , molecule , derivative (finance) , cinnoline , cycloaddition , group (periodic table) , crystal (programming language) , stereochemistry , medicinal chemistry , biochemistry , organic chemistry , computer science , financial economics , programming language , catalysis , economics
The Crystal Structure of a Bridged 1,2,3‐Oxadiazolidin‐5‐one Derivative 3‐(2‐Allylphenyl)‐4‐phenylsydnone ( 1 ) undergoes in solution an intramolecular, 1,3‐dipolar cycloaddition reaction to give 2‐oxo‐1‐phenyl‐1,5‐methano‐1,2,4,5,6,11‐hexahydro [1,2,3] oxadiazolo [3,2‐ a ] cinnoline ( 2 ). The unique 1,2,3‐oxadiazolidin‐5‐one structure of this molecule has been proved by X‐ray analysis. The crystal structure has been solved by direct methods and refined by full‐matrix least squares calculations to R = 0,046. The crystal system is orthorhombic, space group P bca , with unit cell dimensions a = 10,546, b = 15,482, c = 16,531 Å.