@article {2924, title = {STRUCTURE OF DIMETHYL 9-CHLORO-9,10-DIHYDRO-9,10-ETHENOANTHRACENE-11,12-DICARBOXYLATE}, journal = {Acta Crystallographica Section C-Crystal Structure Communications}, volume = {49}, year = {1993}, note = {ISI Document Delivery No.: LA193Times Cited: 1Cited Reference Count: 6Part 4}, month = {Apr}, pages = {846-848}, type = {Article}, abstract = {The two ester groups have different orientations, with C=C-C=O torsion angles of -165.7(3) and -89.4(4)degrees respectively for the groups remote from and adjacent to the Cl substituent. The remote ester group is therefore fully conjugated with the C=C double bond [cos2(angle) = 0.94] and the adjacent group nonconjugated [cos2(angle) = 0], presumably as a result of steric effects.}, keywords = {CRYSTAL-STRUCTURES, SOLID-STATE PHOTOCHEMISTRY}, isbn = {0108-2701}, url = {://A1993LA19300076}, author = {Trotter, J. and Yee, V. C.} }