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Kristall- und Molekulstruktur der 1,4:3,6-Dianhydro--D-glucopyranose (1,5:3,6-Dianhydro--D-glucofuranose)


International Union of Crystallography
Copyright (c) 1978 International Union of Crystallography
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Kristall- und Molekulstruktur der 1,4:3,6-Dianhydro--D-glucopyranose (1,5:3,6-Dianhydro--D-glucofuranose)


<h2>Acta Crystallographica Section B</h2><h3>Structural Crystallography and Crystal Chemistry</h3><h3>0567-7408</h3> <h2>research papers</h2> Volume 34 Part 8 Pages 2502-2507 August 1978 <h2>Kristall- und Molekülstruktur der 1,4:3,6-Dianhydro- - D -glucopyranose (1,5:3,6-Dianhydro- - D -glucofuranose)</h2> J. Kopf und P. Köll Acta Cryst. (1978). B34, 2502-2507 Kristall- und Molekiilstruktur der 1,4: 3,6-Dianhydro-~-D-glucopyranose (1,5 : 3,6-Dianhydro-fl-D-glucofuranose) VON JURGEN KOPF Institut ffir A norganische und A ngewandte Chemic der Universitdt Hamburg, Martin-Luther-King-Platz 6, D-2000 Hamburg 13, Bundesrepublik Deutschland UND PETER KOLL Fachbereich 4 der UniversitS"t Oldenburg, Ammerlfinder Heerstrasse 67-99, D-2900 Oldenburg, Bundesrepublik Deutschland (Eingegangen am 30. November 1977; angenommen am 3. Mdrz 1978) 1,4: 3,6-Dianhydro-a-D-glucopyranose, C6HsO4, a pyrolysis product of D-glucose, crystallizes in space group P2,2,2, with a = 6-295 (2), b = 9.002 (4), c = 10.862 (5) A, Z = 4. The tricyclic structure of the title compound was solved by direct methods and refined to a final Rw value of 0.05 for 507 independent reflexions. The pyranose ring of the molecule adopts an almost ideal BL4(D) boat conformation and the furanose ring a distorted envelope conformation, Eo(D) (phase angle P = 276.8°). JORGEN KOPF UND PETER KOLL 2503 Einleitung D-Glucose, das Hauptprodukt der Photosynthese und damit die wichtigste organische Verbindung/iberhaupt, iiefert beim Erhitzen
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