Julia Bąkowicz, I. Turowska-Tyrk
May 25, 2010
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Journal
Journal of Chemical Crystallography
Abstract
N-(4-butyryl-3-hydroxyphenyl)acetamide monohydrate, (I), and 4-(4-chlorophenyl)-2-methyl-4-oxobutanoic acid, (II), are photochemically inert, which is a result of their conformation. The geometrical parameters describing the molecular conformation and possibilities of the Yang photocyclization in crystals have been calculated and discussed. Compound (I) forms double ribbons along the a axis, stabilized by hydrogen bonds and π⋯π interactions. Compound (II) forms dimers. (I): triclinic, space group $$ {\text{P}}\bar{1} $$, a = 6.9291(12) Å, b = 7.5736(16) Å, c = 13.0528(18) Å, α = 79.643(17)°, β = 85.818(15)°, γ = 63.97(2)°, Z = 2. (II): monoclinic, space group P21/c, a = 11.904(2) Å, b = 9.6508(12) Å, c = 10.666(2) Å, β = 110.64(2)°, Z = 4.Graphical AbstractThe analysis of the geometrical parameters explains photochemical inertia of the presented compounds.