Crystal structure of low‐molecular‐weight model compounds having structural features similar to those of high‐molecular‐weight stereoregular polymers: The crystalline structure of meso ‐α‐α′‐dimethyl glutaric acid

The crystal structure of cis-1,2-cyclohexanedicarboxylic acid

“…value. They could be grouped into four sets, each made up of four similar combinations, i.e., differing only in few signs (3)(4)(5). We took into consideration only the signs in common to the four combinations of each Comparison of the molecular models of the 1,2-frans and 1,2-ris-cycIohexanedicarboxylic acids.…”

The crystal and molecular structure of furane-α,α'-dicarboxylic acid

“…When this is verified, and the direction of the row axis in the crystal lattice is found, the determination of the position of the asymmetric units in the unit cell is greatly simplified. In fact while in the general case six coordinates have to be determined (three translations and three Euler angles), in the actual case only one parameter, namely the rotation angle about the row axis, needs to be determined (Corradini, Diana, Ganis & Pedone, 1963;Ganis, Pedone & Temussi, 1964;Corradini, Avitabile, Ganis & Martuscelli, 1966). From the systematic absence (0k0, k = 2n + 1) the space group is P21 or P21/m.…”