ISSN:
1572-9001
Keywords:
Molecular structure
;
1,2,4,5-tetracyanobenzene
;
electron diffraction
;
ab initio
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The molecular structure of 1,2,4,5-tetracyanobenzene has been determined by gas-phase electron diffraction and by ab initio calculations at several levels of theory. The electron diffraction study indicates an elongation of the aromatic ring along the (H)C•••C(H) axis, characterized by angular deformation of the benzene ring and lengthening of the (NC)C—C(CN) bonds. The following bond lengths (r g) and bond angles were obtained by electron diffraction: $$\left( {C - C} \right)_{ring,mean} 1.406 \pm 0.003{\AA},C - C\left( N \right)1.429 \pm 0.003{\AA},C \equiv N1.161 \pm 0.002{\AA},\angle C_{ipso} - C_{ipso} 118.0 \pm 0.4^ \circ ,C_{ipso} - C_{ipso} C\left( N \right)120.8 \pm 0.3^ \circ $$ .
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022089415252
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