Topic
Fluorenone
About: Fluorenone is a research topic. Over the lifetime, 1067 publications have been published within this topic receiving 17162 citations. The topic is also known as: Diphenylene ketone & 9-Oxofluorene.
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Patent•
28 Apr 1952
7 citations
TL;DR: In each structure the asymmetric unit consists of two molecules whose parallel rings are at van der Waals distances and stack, alternately, along the a axis for (I) and along the n-glide direction for (II).
Abstract: In each structure the asymmetric unit consists of two molecules whose parallel rings are at van der Waals distances and stack, alternately, along the a axis for (I) and along the n-glide direction for (II). The carbon-skeleton geometry of the fluorenone within both charge-transfer complexes is not significantly altered from that of the parent 2,4,5,7-tetranitro-9-fluorenone
7 citations
TL;DR: Evidence is presented which suggests that the base-induced formation of difluorenylidene from fluorenone sulphine occurs through a sulphoxide dianion in a reaction sequence similar to the phenyl-lithium-promoted conversion of dibenzyl sulphoxide into stilbene.
Abstract: Evidence is presented which suggests that the base-induced formation of difluorenylidene from fluorenone sulphine occurs through a sulphoxide dianion in a reaction sequence similar to the phenyl-lithium-promoted conversion of dibenzyl sulphoxide into stilbene.
7 citations
Patent•
16 Sep 2002
TL;DR: In this paper, a method for preparing bromofluorenes includes a step of dispersing a compound selected from the group consisting of fluorene, fluorenone, and derivatives of fluoresce and fluoresnone in water to prepare a disperse system.
Abstract: A method for preparing bromofluorenes includes a step of dispersing a compound selected from the group consisting of fluorene, fluorenone, and derivatives of fluorene and fluorenone in water to prepare a disperse system. Bromination is initiated by adding bromine Br2 into the disperse system. Thus, bromofluorenes can be efficiently and economically prepared without using any environmentally harmful organic solvent requiring a high cost to dispose of.
7 citations
Patent•
30 Jan 1978
TL;DR: An improved process for the production of pure fluorenone by oxidation of fluorene with air or oxygen at ambient temperature in the presence of a quaternary salt is described in this article.
Abstract: An improved process for the production of pure fluorenone by oxidation of fluorene with air or oxygen at ambient temperature in the presence of a quaternary salt, the improvement comprising carrying out the reaction in a suspension of fluorene or a fluorene-containing fraction in an aprotic immiscible with water solvent, such as a α-methyl naphthalene, which contains and is primed with a 30%-60% aqueous alkali metal hydroxide solution, and intimately mixing the organic and aqueous phases during the reaction.
7 citations