Crystal structures of 2,4,9-trimethyl-(3ar,4c,9c,9ac)-3a,4,9,9a-tetrahydro-benzo[f] isoindole-1,3-dione(endo), C15H17NO2(1), and 2-methyl-(3ac,9ac)-3a,4,9,9a-tetrahydro-4r,9c-ethano-benzo[f]isoindole-1,3-dione(endo), C15H15NO2(2)

摘要

The title compounds crystallize in the space group P-1 (compound 1), with a = 7.198(2) angstrom, b = 7.965(2) angstrom, c = 12.707(2) angstrom, alpha = 72.05(1)degrees, beta = 87.65(2)degrees, gamma = 65.18(2)degrees and Pbca (compound 2), with a = 8.156(3) angstrom, b = 13.177(3) angstrom, c = 22.742(4) angstrom. The chiral centers in both compounds C3a, C4, C9, C9a are either R, S, R, S or S, R, S, R (compound 1) and either R, R, S, S or S, S, R, R (compound 2) because of the centric space group.