Abstract
In the two title compounds, the 2-methyl-1,3-dioxoindan-2-yl and 4-(brom; ethoxy) phenyl groups aretrans with respect to one another. The phenyl ring and the azo group are not coplanar in the two molecules. The five-membered rings of the two compounds adopt an envelope conformation. The crystallographic parameters are as follows: 2-Methyl-2-(4-bromphenylazo)-1,3-indandione (I): monoclinic, P21/a witha=8.098(2),b=14.442(2),c=12.554(1)Å, β=100.55(2)o, andD calc=1.58 g cm−3 forZ=4; 2-methyl-2-(4-ethoxyphenylazo)-1, 3-indandione (II): monoclinic, P21/a witha=8.258(2),b=14.449(1),c=13.559(2)Å, β=101.19(1)o, andD calc=1.29 g cm−3 forZ=4.
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Özbey, S., Kendi, E. Crystal structures of two azo compounds, 2-methyl-2-(4-bromphenylazo)-1,3-indandione and 2-methyl-2-(4-ethoxyphenylazo)-1,3-indandione. J Chem Crystallogr 25, 787–790 (1995). https://doi.org/10.1007/BF01670337
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DOI: https://doi.org/10.1007/BF01670337