Crystal Structure of the Racemic Modification of 2,4-Dicyanopentane, a Dimeric Model of Syndiotactic Polyacrylonitrile¹

X-ray diffraction

“…An increasing amount of work is being devoted to the crystal structure of polymeric materials such as polythiomethylene (249), poly(m-xylyleneadipamide) (421), and polyselenomethylene (248). Also a number of monomers such as -aminocaproic acid (225) and oligomers such as 2,4-dicyanopentane (189) and pentane-2,4-dioldiacetate (469) have been investigated. Acrylamide is of interest because it will polymerize in the solid state.…”

“…High-temperature cameras for special purposes, such as the examination of catalysts in the course of a reaction (174), the examination of ceramic systems (155), high-polymer studies (115) and transmission topography (28) have been described. Likewise, we noted an apparatus combining the heating microscope and the Debye-Scherrer camera (189) and another which permitted simultaneous recording of x-ray diagrams, thermograms, and electrical resistance curves (26). Precise temperature control with a gas stream has advantages described by Young (179) and the precise measurement of high-temperatures in x-ray cameras by measuring lattice parameters of an internal standard is described by Merryman and Kempter (123).…”