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Norbornadiene
About: Norbornadiene is a research topic. Over the lifetime, 2389 publications have been published within this topic receiving 38603 citations.
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TL;DR: In this article, the authors synthesize the exo-and endo 4π + 2π cycloadducts of norbornadiene and anthracene with the objective of investigating interactions between an aromatic ring and a rigidly proximal π-bond or carbonium ion.
13 citations
TL;DR: Etude de l'influence de different photosensibilisants (cetones and quinones) and de la longueur d'onde sur le rendement quantique en quadricyclane and sur l'efficacite de la conversion d'energie. as discussed by the authors.
Abstract: Etude de l'influence de differents photosensibilisants (cetones et quinones) et de la longueur d'onde sur le rendement quantique en quadricyclane et sur l'efficacite de la conversion d'energie. La formation d'un polymere est vue. Pour supprimer l'apparition de ce sous-produit, on ajoute une substance phenolique dans le norbornadiene
13 citations
TL;DR: In this paper, the formation of a paramagnetic nickel(I) complex from bis(η3-allyl)nickel under conditions of catalytic norbornadiene dimerization is reported.
Abstract: The kinetics of the formation of a paramagnetic nickel(I) complex from bis(η3-allyl)nickel under conditions of catalytic norbornadiene dimerization is reported. It is demonstrated by ESR and GLC that the concentrations of Ni(I), norbornadiene and its pentacyclic dimers change in the same way. It might be inferred from this finding that Ni(I) is involved in the catalytic process as an intermediate. However, experiments on model systems have not confirmed this assumption. At the same time, they have not ruled out the participation of the paramagnetic complex in side catalytic reactions. The presence of Ni(I) in the reaction system is connected with the presence of free norbornadiene there. Hypotheses as to the probable structure and formation mechanism of the paramagnetic Ni(I) are suggested.
13 citations
13 citations
TL;DR: The tetraphosphine 6A,6B,6D,6E-tetradeoxy (α-TEPHOS) as discussed by the authors is the first optically active tetramerine in which the four phosphine units are tethered to a cavity-shaped scaffold.
Abstract: The tetraphosphine 6A,6B,6D,6E-tetradeoxy-6A,6B,6D,6E-tetra(diphenylphosphinyl)-2A,2B,2C,2D,2E,2F,3A,3B,3C,3D,3E,3F,6C,6F-tetradeca-O-methyl-α-cyclodextrin (α-TEPHOS) has been prepared in high yield by reacting 6A,6B,6D,6E-tetra-O-methylsulfonyl-2A,2B,2C,2D, 2E,2F,3A,3B,3C,3D,3E,3F,6C,6F-tetradeca-O-methyl-α-cyclodextrin with excess PPh2Li. The product was purified in its BH3-protected form. α-TEPHOS is the first optically active tetraphosphine in which the four phosphine units are tethered to a cavity-shaped scaffold. When reacted with [AuCl(tetrahydrothiophene)], α-TEPHOS led to the corresponding tetragold complex [(α-TEPHOS)(AuCl)4] in which the four gold atoms are all located close to the primary face of the cyclodextrin. Reaction with [PdCl(o-C6H4CH2NMe2)]2 gave the C2-symmetrical complex [(α-TEPHOS){PdCl(o-C6H4CH2NMe2)}4]. Treatment of the ligand with two equiv. of [Rh(norbornadiene)(tetrahydrofuran)2]BF4 afforded selectively the bimetallic complex [(α-TEPHOS){Rh(norbornadiene)}2](BF4)2 in which each metal centre is coordinated to two phosphorus atoms belonging to adjacent glucose units.
13 citations