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BrC6H4C2H2COC6H4OCH3, Mr = 317. 19, is monoclinic, space group PC with unit cell of a = 15. 869(3), b = 7. 146(2), c=5. 991(1) (?); β=82.85 (1)°; Z = 2, Dc=1. 56g/cm3; V = 674. 1(?)3; λ(MoKa) = 0. 71073A, μ= 30. 1 cm-1, F(000) = 320e, final R = 0. 040, Rw = 0. 041 for 993 observed reflections with I>3σ(I). As the two phenyl planes and the C2H2CO group are non-coplanar, the conjugated system was disturbed. This will produce a large hypsochromic shift of cutoff wavelength of transmission.
BrC6H4C2H2COC6H4OCH3, Mr = 317. 19, is monoclinic, space group PC with unit cell of a = 15. 869 3, b = 7. 146 2, c = 1 (?) 82.85 (1) °; Z = 2, Dc = 1.56 g / cm3; V = 674.1 ;? MoKa = 0. 71073A, = 320e, final R = 0. 040, Rw = 0. 041 for 993 observed reflections with I> 3σ (I). As the two phenyl planes and the C2H2CO group are non-coplanar, the conjugated system was disturbed. This will produce a large hypsochromic shift of cutoff wavelength of transmission.