ABICYCLO[4.1.0]HEPTA-2,4-DIEN-3-IUM-3-YL)METHANIDE AND ZACYCLOPENTA-1,3-DIEN-1-IUM-1-YL)DICYANOMETHANIDE, 2 STABLE AZOMETHINE YLIDES

Authors
BREU J RANGE KJ RIEBEL P WEBER A SAUER J
Citation
J. Breu et al., ABICYCLO[4.1.0]HEPTA-2,4-DIEN-3-IUM-3-YL)METHANIDE AND ZACYCLOPENTA-1,3-DIEN-1-IUM-1-YL)DICYANOMETHANIDE, 2 STABLE AZOMETHINE YLIDES, Acta crystallographica. Section C, Crystal structure communications, 52, 1996, pp. 2053-2056
Citations number
12
Categorie Soggetti
Crystallography
Journal title
Acta crystallographica. Section C, Crystal structure communications → ACNP
ISSN journal
01082701
Volume
52
Year of publication
1996
Part
8
Pages
2053 - 2056
Database
ISI
SICI code
0108-2701(1996)52:<2053:AAZ>2.0.ZU;2-X
Abstract
The azomethine ylide moieties of no(7,7-dimethyl-2,5-di-p-tolyl-3,4-di azabicyclo[4. 1.0]hepta-2,4-dien-3-ium-3-yl)methanide, C24H22N4, and z acyclopenta-1,3-dien-1-ium-1-yl)dicyanomethanide, C22H17N3O, show norm al bond distances and angles in comparison with related structures rep orted previously. The dipolar N-C distances of 1.430(4) and 1.401(3)An gstrom are appreciably shortened compared with the C-N+ bond lengths [ 1.485(9)Angstrom] found in N-substituted pyridinium compounds, which i s consistent with previous observations. Both title compounds pack in such a way that the ylide dipoles are arranged above each other but po inting in opposite directions.