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RESTRICTED ROTATION INVOLVING THE TETRAHEDRAL CARBON. III. ISOLATION OF ISOMERS DUE TO RESTRICTED ROTATION ABOUT AN sp 3 –sp 3 CARBON BOND

1972; Oxford University Press; Volume: 1; Issue: 1 Linguagem: Inglês

10.1246/cl.1972.45

1348-0715

Michinori Ōki, Gaku Yamamoto,

Analytical Chemistry and Chromatography

Abstract A dl pair and a meso form of dimethyl 9-(1,1-dimethyl-2-phenylethyl)-9,10-dihydro-9,10-ethenoanthracene-11,12-dicarboxylate are obtained as stable isomers at room temperature. These isomers must originate from restricted rotation about the C9–Cα bond. Data for the thermal equilibrations and activation parameters for the interconversion are obtained.