Crystal and molecular structure of 2,5-dimethyl-3,4-diacetylfuran |
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| Authors: | S Baggio L M Amzel |
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| Institution: | (1) Facultad de Ciencias, Escuela de Quimica, Universidad Central de Venezuela, Venezuela;(2) Department of Biophysics, The Johns Hopkins University, School of Medicine, 725 N. Wolfe Street, 21205 Baltimore, Maryland;(3) Present address: Departamento de Quimica Inorganica, Universidad de Buenos Aires, Facultad de Farmacia y Bioquimica, Junin 956, Buenos Aires, Republica Argentina |
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| Abstract: | The crystal and molecular structure of 2,5-dimethyl-3,4-diacetylfuran has been determined by direct methods using CuK . photographic data. Refinement by full-matrix least-squares methods gave a finalR factor of 0·097. The crystals are monoclinic: space groupP21/c,a =14·92(2),b = 4·09(1),c =16·68(3) Å and  = 109·7(5) °;Z = 4. The furan ring of the molecule is planar, and the exocyclic atoms bound to the atoms of the ring lie close to the ring plane. The planes of the acetyl groups are tilted by 16 ° and 47 ° with respect to the ring plane. The exocyclic bond angles of this compound are significantly different from the equivalent angles in furan. |
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