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The effective size of the lone pair on nitrogen

✍ Scribed by N.L. Allinger; J.G.D. Carpenter; F.M. Karkowski


Publisher
Elsevier Science
Year
1964
Tongue
French
Weight
207 KB
Volume
5
Category
Article
ISSN
0040-4039

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πŸ“œ SIMILAR VOLUMES


The β€œsize” of the lone pair on nitrogen
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During the last few years there has been a flurry of activity directed at determining the relative siee of the lone pair on nitrogen with respect to other nitrogen substituents!

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In quinolizidine derivatives, infrared bands in the -1 2700-2800 cm region have been correlated with the presence of at least two g-hydrogen atoms oriented trans to the lone pair (1, 2, 3). c However a few exceptions e.g., 3-epialloyohimbone and 3-epialloyohimblne ( 4)] have already been reported. R

Natural J coupling (NJC) analysis of the
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## Abstract The known lone pair orientation effect of an α‐nitrogen atom on ^1^__J__(C,C) couplings was studied using the natural __J__ coupling (NJC) dissection method for the Fermi contact (FC) term. This dissection was performed at the DFT‐B3LYP level using three different basis sets. It was ver

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Ab initio and MM2 calculations are used to investigate charge distributions in different conformations of the hydroxyl groups in unsaturated alcohols containing norbomyl units. The calculated net atomic charges indicate that hydrogens as well as carbons lying between oxygen lone pairs become more po

Carbon-13 nuclear magnetic resonance spe
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## Abstract The carbon‐13 n.m.r. spectra of several oxaziridines were measured. Aliphatic and aromatic __ipso__ carbon atoms __trans__ to the lone pair of nitrogen in oxaziridines were shifted upfield by __c.__ 9 ppm, and 3.4 ppm, respectively, in comparison with isomers of inverted configuration.