Dialin isomers

In summary, the A1- and A2-dialin isomers have been shown to be appreciably more active than etralin (and decalin) in transferring hydrogen to anthracene and phenanthrene. The observed selectivity of this hydrogen transfer is in accord with the Woodward-Hoffman rules for group transfer reactions, anthracene conversions being in the ratio ( 3 / 0 ) = 12/1 >> 1 while phenanthrene conversions are in the ratio ( 0/(33 ) = 0.6/1 < 1. The quantitative differences in the selectivities observed with anthracene and phenanthrene are being further explored. 

A second series of liquefaction experiments were conducted to test the theoretical suggestion that a mixture of A1- plus A2-dialin isomers might be a more effective solvent than either one of the dialins alone. Preliminary results at 400 C and 0.5 hr reaction time, are shown in Table 4 which quotes the ratio of... 

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