The mechanism of activated nucleophilic substitution in the aromatic series (S. N. A.*) can be integrated in the general scheme of S. N. synchronous mechanisms. The relative order of mobilities of the halogens in S. N. A. * type reactions, wich varies with the nucleophilic activity of ...
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As I did not want to accept the idea that the manuscripts were made just to prove the wealthy situation of these people, I used the fact that they had close relationships with new religious trends in order to demonstrate that the Légende Dorée was read with a sincere devotional purpose. ...
Beogo R, Andonaba JB, Bouletreau P, Traore Sawadogo H, Traore A. Xeroderma pigmentosum revele par des carcinomes epidermoides multiples de la face chez un enfant. Rev Stomatol Chir Maxillofac 2012;113:50-2.Beogo R, Andonaba JB, Bouletreau P, Traore Sawadogo H, Traore A. Xeroderma ...
Les problèmes fondamentaux de la géodésie et les solutions qui y ont été apportées grâce à l'observation des satellites artificiels的书评 ··· ( 全部0 条 ) 论坛 ··· 在这本书的论坛里发言 + 加入购书单 ...
– Introduction of a methyl group in position 4 (angular position) has a deshielding effect on the proton located on carbon 5 (opposite angular position). – The main results are summarized in table I and figure 1.Martin, R. H.Université Libre de Bruxelles, Service de Chimie Organique, ...
En este trabajo se realiza una revisión de las contribuciones realizadas en el ámbito de la psicología social al estudio de la satisfacción de los usuarios y consumidores. En concreto, se constata que la investigación se ha realizado predominantemente desde acercamientos cognitivos (confirmaci...
Thus, we propose a load sharing method, a splitting technics adapted for the size of search contexts and a function to evaluate the divisibility of a task. We apply and specialize our algorithms in solving the problem of cutting plan, i. E. Position asignement for random pieces on a ...
(International Criminal Tribunals for former Yugoslavia and Rwanda and International Criminal Court) cannot escape the obligation to respect the legality of penalties, even more so as the sole penalty applicable at the international level (imprisonment) threatens a most essential protected legal good: ...
The results obtained as well as the rate constants for neutral or acid catalysed addition always reveal a slight preference for thetrans-isomer (× 2.4). This result agrees with the proposal that preferential equatorial attack of a nucleophile is caused by conformational factors related to a ...