Acta Crystallographica Section C

Crystal Structure Communications

Volume 65, Part 3 (March 2009)

organic compounds

Acta Cryst. (2009). C65, o108-o110 [ doi:10.1107/S0108270109004041 ]

Two crystal forms of mesogenic bis(4'-cyanobiphenyl-4-yl) butanedioate

K. Hori and N. Kouno

Abstract: The title compound, C₃₀H₂₀N₂O₄, exhibits a nematic phase in the wide temperature range between 498.5 and 538.6 K, in spite of the short linker moiety. Two crystal forms have been found. In both forms, the molecule is centrosymmetric. Form I has a planar biphenyl group, while form II has a twisted biphenyl group with a twist angle of 34.75 (6)°. The packing modes are also different. In form I the long molecular axes are tilted with respect to each other at about 30°, while in form II the long molecular axes have an almost parallel arrangement.

Formula: Two forms of C₃₀H₂₀N₂O₄


	Structure factor file (CIF format) (100.0 kbytes) [ doi:10.1107/S0108270109004041/eg3008Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (103.2 kbytes) [ doi:10.1107/S0108270109004041/eg3008IIsup3.hkl ] Contains datablock II

Notes:

To open or display or play some files, you may need to set your browser up to use the appropriate software. See the full list of file types for an explanation of the different file types and their related mime types and, where available links to sites from where the appropriate software may be obtained.

The download button will force most browsers to prompt for a file name to store the data on your hard disk.

Where possible, images are represented by thumbnails.

Search: From to Advanced search