Chemical and physical properties of fluorenylidene: equilibration of the singlet and triplet carbenes
作者:Peter B. Grasse、Beth Ellen Brauer、Joseph J. Zupancic、Kenneth J. Kaufmann、Gary B. Schuster
DOI:10.1021/ja00361a014
日期:1983.11
Formationde fluorenylidene par photolyse laser pulsee de diazo-9 fluorene a temperature ambiante ou a 10 K. Espece a l'etat d'equilibre entre carbenes singulet et triplet. Reactions du fluorenylidene avec l'acetonitrile, le cyclohexane et divers alcools et olefines. Spectres d'absorption visible. Mecanismes. Produits de cyclopropanation
形成 de fluorenylidene par 光解激光脉冲 de diazo-9 芴 a 温度 ambiante ou a 10 K. Espece a l'etat d'equilibre entre carbenes singulet et 三重峰。反应 du fluorenylidene avec l'乙腈、le 环己烷和 divers alcools 和烯烃。幽灵d'吸收可见。机制。环丙烷化产品
Aldehyde/ketone-catalyzed highly selective synthesis of 9-monoalkylated fluorenes by dehydrative C-alkylation with primary and secondary alcohols
By using aldehydes or ketones as the catalyst and screening CsOH out as the more effective base than KOH in many instances, an efficient 9-C-alkylation of fluorenes with alcohols was...
Contrasting chemistry of diphenylcarbene and fluorenylidene in cyclohexane
作者:T.G. Savino、V.P. Senthilnathan、M.S. Platz
DOI:10.1016/s0040-4020(01)90595-2
日期:1986.1
The chemistry of diphenylcarbene and fluorenylidene in cyclohexane was investigated. An examination of the product distributions, radical scavenging experiments and isotopic fractionation established that diphenylcarbene reacts with cyclohexane predominantly, if not exclusively, through its triplet state whereas fluorenylidene exhibits substantial chemistry from its low lying singlet state in addition
Unverbrücke fluorenylkomplexe des typs (C5H5)(9-R-C13H8)ZrCl2 (R Me3Si, alkyl, aryl): synthese, charakterisierung und anwendung als katalysatoren bei der homogenen olefinpolymerisation
作者:Michael A. Schmid、Helmut G. Alt、Wolfgang Milius
DOI:10.1016/s0022-328x(96)06480-7
日期:1996.11
compounds (9-R-C-13H9) (R Me3Si, alkyl, aryl) (1a−i) with butyllithium followed by treatment with (C5H5)ZrCl3 leads to unbridged fluorenyl complexes of the type (C5H5)(9-R-C13H8)ZrCl2. In combination with methylaluminoxane, complexes 2a−i show at high catalytic activity as homogeneous ethylene polymerization catalysts. Compounds 2c (R 1Pr), 2d (R = cyclohexyl), and 2e (R 1Bu) were characterized
各种9-取代的芴化合物(9-RC- 13 H 9)(RMe 3 Si,烷基,芳基)(1a-i)与丁基锂反应,然后用(C 5 H 5)ZrCl 3处理(C 5 H 5)(9-RC 13 H 8)ZrCl 2类型的未桥接芴基配合物。与甲基铝氧烷组合使用时,配合物2a-i作为均相乙烯聚合催化剂具有较高的催化活性。通过X射线结构分析表征化合物2c(R 1 Pr),2d(R =环己基)和2e(R 1 Bu)。
Fluorenylidene: kinetics and mechanisms
作者:D. Griller、L. Hadel、A. S. Nazran、M. S. Platz、P. C. Wong、J. C. Scaiano
DOI:10.1021/ja00320a001
日期:1984.4
Irradiation laser du diazo-9 fluorene en solution conduisant a une espece transitoire, un carbene triplet en equilibre thermique avec l'etat singulet plus reactif. Insertion de l'etat singulet dans les liaisons C-H. Etude des diverses reactions de l'etat singulet. Caracterisation du radical fluorenyle-9
辐照激光 du diazo-9 芴溶液 conduisant a une espece transitoire, un carbene 三重态 en equilibre thermique avec l'etat singulet plus reactif。插入 de l'etat singulet dans les liaisons CH。Etude des different reactors de l'etat singulet。芴基 9 基化