Stereoelectronic effects in cyclic sulfoxides, sulfones, and sulfilimines: application of the Perlin effect to conformational analysis.
Stereoelectronic effects in cyclic sulfoxides, sulfones, and sulfilimines: application of the Perlin effect to conformational analysis.
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环状亚砜、砜和硫亚胺中的立体电子效应:柏林效应在构象分析中的应用
DOI:
10.1002/chem.200601468
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发表时间:
2007
期刊:
影响因子:
--
通讯作者:
Claus Feldmann
中科院分区:
文献类型:
--
作者:
Tobias Wedel;Monika Müller;Joachim Podlech;Helmut Goesmann;Claus Feldmann
The1JCHcoupling constants in conformationally constrained sulfoxides, bissulfoxides, sulfoxide‐sulfones, and sulfilimines derived from 2‐benzylidene‐1,3‐dithiane and 2‐(2,2‐dimethylpropylidene)‐1,3‐dithiolane were measured by means of HMQC and HSQC NMR experiments and the Perlin effects were calculated. The type and the relative configuration of SX groups (X= O, NTos) in these compounds have a strong influence on the magnitude of coupling constants for axial and equatorial CH bonds, respectively. Axial SO bonds give rise to a stereoelectronic effect on antiperiplanar axial CH bonds. The resultant weakening of the respective CH bonds leads to a smaller coupling constant than for a respective equatorial CH bond. Equatorial SO groups have an influence on β‐CH bonds through a homoanomeric effect. Here, the axial CH bond is weakened and a smaller coupling constant is measured. Sulfilimine groups show similar effects to sulfoxide groups.
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影响因子:
3
作者:
D. B. Chesnut;L. D. Quin
通讯作者:
L. D. Quin
DOI:
--
发表时间:
1976
期刊:
影响因子:
--
作者:
N. D. Epiotis;R. Yates;F. Bernardi;S. Wolfe
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S. Wolfe
影响因子:
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作者:
S. Wolfe;B. Pinto;V. Varma;Ronald Y. N. Leung
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15
作者:
CIEPLAK, AS
通讯作者:
CIEPLAK, AS
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
I. Jalsovszky;Á. Kucsman;F. Ruff;T. Koritsanszky;G. Argay;A. Kălmăn
通讯作者:
A. Kălmăn