Two Crystal Forms of 4'-octyloxy-4-cyanobiphenyl (8OCB)

Four crystalline phases were found for 4'-octyloxy-4-cyanobiphenyl, C₂₁H₂₅NO. These were square-plate, needle and long parallelepiped crystals, which are all metastable, and a phase found in a commercially available powder specimen, which was the most stable. The structures of the needle and long parallelepiped crystals have been determined at room temperature and 243 K, respectively.

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