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Triclinic polymorph of 4-[4- (4formylphenoxy)butoxy]benzaldehyde

The title compound, C18H18O4, is a triclinic polymorph of thepreviously reported monoclinic polymorph [Han & Zhen(2005). Acta Cryst. E61, o4358–o4359]. In the crystal of the triclinic polymorph, molecules are linked by two pairs of C— H  O hydrogen bonds, forming a two-dimensional network parallel to (102), and enclosing loops with graph set motifs of R22(8) and R22(6).

dialdehydes ; crystal structure ; polymorph

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