(EIZ)??Equilibria, 19 Dimeric α??Lithio??2, 6??dimethylstyrene
R Knorr, C Behringer, E Lattke, E Räpple…
Index: Knorr, Rudolf; Behringer, Claudia; Noeth, Heinrich; Schmidt, Martin; Lattke, Ernst; Raepple, Edith Chemische Berichte, 1997 , vol. 130, # 5 p. 585 - 592
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Citation Number: 8
Abstract
Abstract Improved preparations of 2, 6-dimethylstyrene (5) and its α-bromo derivative (10) are described. The Br/Li exchange reaction of 10 provides single crystals of the title compounds 11 or 12, which were characterized as disolvated dimers by X-ray analyses. A similar dimer persists in diethyl ether, tert-butyl methyl ether, and toluene at all accessible temperatures, with significant lithiation NMR shifts (relative to 5) partially due to charge ...
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