C13H7C15 O, Mr=356.5, triclinic, Pi (No. 2), a=9.470(1), b=9.700(1), c=10.090 (1) A, a= 64.84 (1), t= 105.86 (1), ),= 122.31 (1) °, v= 707.7/~3, z = 2, D x = 1.67 Mg m -3, ~,(Mo Kct) = 0.7107 A, /t = 1.02 mm -~, F(000) = 356, T= 296 K, final R = 0.049 for 2963 unique observed reflections. The two chlorine substituents occupying the ortho positions (2 and 2') in the phenyl rings and the n-electron overlap between adjacent molecules cause a twist angle of 75.35 (9) ° between the phenyl rings. The methoxy group is nearly coplanar {deviation of the methoxy carbon [C(7)] from the least-squares plane is -0.208 (4) A} with the phenyl ring.
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