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Sterically hindered nitrogen inversion in five-membered cyclic hydrazines

Sergei Valer'evich Usachev 1
Sergei Valer'evich Usachev
, 
Grigorii Alekseevich Nikiforov 2
Grigorii Alekseevich Nikiforov
, 
Yurii Andreevich Strelenko 3
Yurii Andreevich Strelenko
, 
Pavel Alekseevich Belyakov 3
Pavel Alekseevich Belyakov
, 
Ivan Ivanovich Chervin 1
Ivan Ivanovich Chervin
, 
Remir Grigorevich Kostyanovsky 1
Remir Grigorevich Kostyanovsky
10.1070/MC2002v012n05ABEH001626
Published 2002-11-15
Communication , Volume 12, Issue 5, 189-193
5
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Usachev S. V. et al. Sterically hindered nitrogen inversion in five-membered cyclic hydrazines // Mendeleev Communications. 2002. Vol. 12. No. 5. pp. 189-193.
GOST all authors (up to 50) Copy
Usachev S. V., Nikiforov G. A., Strelenko Y. A., Belyakov P. A., Chervin I. I., Kostyanovsky R. G. Sterically hindered nitrogen inversion in five-membered cyclic hydrazines // Mendeleev Communications. 2002. Vol. 12. No. 5. pp. 189-193.
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TY - JOUR
DO - 10.1070/MC2002v012n05ABEH001626
UR - https://mendcomm.colab.ws/publications/10.1070/MC2002v012n05ABEH001626
TI - Sterically hindered nitrogen inversion in five-membered cyclic hydrazines
T2 - Mendeleev Communications
AU - Usachev, Sergei Valer'evich
AU - Nikiforov, Grigorii Alekseevich
AU - Strelenko, Yurii Andreevich
AU - Belyakov, Pavel Alekseevich
AU - Chervin, Ivan Ivanovich
AU - Kostyanovsky, Remir Grigorevich
PY - 2002
DA - 2002/11/15
PB - Mendeleev Communications
SP - 189-193
IS - 5
VL - 12
ER -
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@article{2002_Usachev,
author = {Sergei Valer'evich Usachev and Grigorii Alekseevich Nikiforov and Yurii Andreevich Strelenko and Pavel Alekseevich Belyakov and Ivan Ivanovich Chervin and Remir Grigorevich Kostyanovsky},
title = {Sterically hindered nitrogen inversion in five-membered cyclic hydrazines},
journal = {Mendeleev Communications},
year = {2002},
volume = {12},
publisher = {Mendeleev Communications},
month = {Nov},
url = {https://mendcomm.colab.ws/publications/10.1070/MC2002v012n05ABEH001626},
number = {5},
pages = {189--193},
doi = {10.1070/MC2002v012n05ABEH001626}
}
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Usachev, Sergei Valer'evich, et al. “Sterically hindered nitrogen inversion in five-membered cyclic hydrazines.” Mendeleev Communications, vol. 12, no. 5, Nov. 2002, pp. 189-193. https://mendcomm.colab.ws/publications/10.1070/MC2002v012n05ABEH001626.

Abstract

We found that (PriNH)2 with MeCHO form only pyrazoline 1 because of the competitive crotonization of the latter followed by reaction with hydrazine; pyrazoline 2, pyrazolidinones 6 and 9, pyrazolidinol 8 and pyrazolidine 7, in which the inversion of nitrogen atoms is hindered by bulky PriN substituents, were prepared for the first time, and the inversion barriers were determined.

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