|Title||STRUCTURE OF DIMETHYL 9-METHYL-9,10-DIHYDRO-9,10-ETHENOANTHRACENE-11,12-DICARBOXYLATE|
|Publication Type||Journal Article|
|Year of Publication||1993|
|Authors||Pokkuluri, PR, Trotter, J|
|Journal||Acta Crystallographica Section C-Crystal Structure Communications|
|Type of Article||Article|
There are two molecules per asymmetric unit and the two ester groups have different orientations m each of them; the C=C-C=O torsion angles are 1.9 and 2.4(6)degrees for the groups remote from and 91.7 and -91.4(5)degrees for the groups adjacent to the 9-Me substituents. The remote ester groups are therefore fully conjugated with the C=C double bond [cos2(angle) = 1.0] and the adjacent groups non-conjugated [cos2(angle) = 0], presumably as a result of steric effects as in the 9-chloro derivative.
|URL||<Go to ISI>://A1993LN00600047|