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- W2067236476 abstract "Crystals of C 25 H 26 O 3 are triclinic, space group Pi, with a=9.197(2), b=10.357 (2), c=11.086 (3) A, α=94.07 (2), β=98.21 (3), γ=90.82(2) °, V=1042.2 A 3 , Z=2, D obs =1.19, , D calc =1.198 Mg m -3 and μ (Cu Kα)=0.661 mm -1 ; R=6.2% for 2525 significant reflections. Crystals of C 24 H 24 O 3 (B) are monoclinic, space group P21/a, with a=11.584 (2), b=11.315 (2), c=15.900 (4) A, β=104.02 (2)°, V=2022.4 A 3 , Z=4, D obs =1.199, D calc =1.185 Mg m -3 and μ (Cu Kα=0.081 mm -1 ; R=4.2% for 1990 significant reflections. The steric strain introduced by the bulky sbstituents on the norbornenone system is discussd. In addition, a possible relationshp between the orienation of the ester function and the anisochrony of O-methylene protons is brought out." @default.
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- W2067236476 date "1981-03-01" @default.
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- W2067236476 title "The structures of ethyl 1,4,5-<i>exo</i>-trimethyl-7-oxo-2,3-diphenylbicyclo[2.2.1]hept-2-ene-5-<i>endo</i>-carboxylate (<i>A</i>) and ethyl 1,4-dimethyl-7-oxo-2,3-diphenylbicyclo[2.2.1]hept-2-ene-5-<i>endo</i>-carboxylate (<i>B</i>)" @default.
- W2067236476 doi "https://doi.org/10.1107/s0567740881003713" @default.
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