Abstract

<h2>Acta Crystallographica Section B</h2><h3>Structural Crystallography and Crystal Chemistry</h3><h3>0567-7408</h3> <h2>research papers</h2> Volume 24 Part 2 Pages 175-179 February 1968 <h2>The crystal and molecular structure of furane- , '-dicarboxylic acid</h2> E. Martuscelli and C. Pedone 175 Acta Cryst. (1968).B24, 175 The Crystal and Molecular Structure of Furane-a,a'-Dicarboxylic Acid BY EzIo MARTUSCELLI AND CARLO PEDONE Sezione VII, Centro Nazionale di Chimica Macromolecolare del C.N.R., Istituto Chimico, Universitft di Napoli, Via Mezzoeannone 4, Napoli, Baly (Received 18 April 1967) Furane-g,~'-dicarboxylic acid crystallizes in the monoclinic system. The unit cell dimensions are a=4-97, b= 16"69, c=3-66/~;//=96°. The space group is P21/m with two molecules in the unit cell. The atomic parameters were refined by the differential synthesis method. The structure consists of hydrogen-bonded molecules, the bonds being between carboxylic groups of centrosymmetrically related molecules. The molecular rows are directed along the crystallographic b axis. Introduction The investigation of furane-c%cd-dicarboxylic acid has been undertaken as a part of a project for studying the crystal and molecular structure of a series of di- carboxylic acids for which there is a reasonable expec- tation that their molecules are associated in rows in the crystal lattice. When this is verified, and the direc- tion of the row