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Description: Thymine crystallizes from 50% hydrogen peroxide to give the title hydrogen peroxide water solvate, C5H6N2O2·0.55H2O2·0.45H2O. The disordered peroxide and water molecules occupy the same positions. Thymine molecules are linked together by N—H...O hydrogen bonds forming chains parallel to the ac diagonal. Hydrogen peroxide molecules are combined by O—H...O hydrogen bonds to give chains parallel to the c axis. Both kinds of chains are organized in a three-dimensional hydrogen-bonded network.

Electronic ISSN: 1600-5368

Topics: Chemistry and Pharmacology , Geosciences

Published by International Union of Crystallography

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Coumarin-3-carboxylic acid: a secondP21/cmodification (2007)

Sparkes, Hazel A. ; Howard, Judith A. K.

International Union of Crystallography

In: Acta Crystallographica Section E: Crystallographic Communications. 2007; 63(9): o3894-o3894. Published 2007 Aug 24. doi: 10.1107/s1600536807040834.

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Publication Date: 2007-08-24

Electronic ISSN: 1600-5368

Topics: Chemistry and Pharmacology , Geosciences

Published by International Union of Crystallography

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3-(Bromoacetyl)coumarin: a secondP21/cmodification (2007)

Sparkes, Hazel A. ; Howard, Judith A. K.

International Union of Crystallography

In: Acta Crystallographica Section E: Crystallographic Communications. 2007; 63(9): o3895-o3895. Published 2007 Aug 24. doi: 10.1107/s1600536807040846.

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Publication Date: 2007-08-24

Electronic ISSN: 1600-5368

Topics: Chemistry and Pharmacology , Geosciences

Published by International Union of Crystallography

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2-Naphthyl benzenesulfonate (2007)

Vembu, Nagarajan ; Shafna, Karattu Chali ; Sparkes, Hazel A. ; [et al.]

International Union of Crystallography

In: Acta Crystallographica Section E: Crystallographic Communications. 2007; 63(8): o3545-o3545. Published 2007 Jul 20. doi: 10.1107/s160053680703437x.

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Publication Date: 2007-07-20

Electronic ISSN: 1600-5368

Topics: Chemistry and Pharmacology , Geosciences

Published by International Union of Crystallography

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4-(Acetylamino)phenyl benzenesulfonate (2007)

Vembu, Nagarajan ; Sparkes, Hazel A. ; Howard, Judith A. K.

International Union of Crystallography

In: Acta Crystallographica Section E: Crystallographic Communications. 2007; 63(8): o3544-o3544. Published 2007 Jul 20. doi: 10.1107/s1600536807034332.

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Publication Date: 2007-07-20

Electronic ISSN: 1600-5368

Topics: Chemistry and Pharmacology , Geosciences

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4-Nitrophenyl benzenesulfonate (2007)

Vembu, Nagarajan ; Sparkes, Hazel A. ; Howard, Judith A. K.

International Union of Crystallography

In: Acta Crystallographica Section E: Crystallographic Communications. 2007; 63(8): o3543-o3543. Published 2007 Jul 20. doi: 10.1107/s1600536807034381.

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Publication Date: 2007-07-20

Electronic ISSN: 1600-5368

Topics: Chemistry and Pharmacology , Geosciences

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Short N...O hydrogen bonds in the 1:1 adduct of 4,4′-bipyridyl and oxalic acid (2007)

Cowan, John A. ; Howard, Judith A. K. ; Puschmann, Horst ; [et al.]

International Union of Crystallography

In: Acta Crystallographica Section E: Crystallographic Communications. 2007; 63(3): o1240-o1242. Published 2007 Feb 09. doi: 10.1107/s1600536807005156.

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Publication Date: 2007-02-09

Description: Oxalic acid, C2O4H2, and 4,4′-bipyridyl, C10H8N2, crystallize in a 1:1 ratio. The asymmetric unit consists of one oxalic acid (OXA) molecule and one 4,4'bipyridyl (BPY) molecule in general positions, together with one half-OXA molecule and one half-BPY molecule; the latter two molecules are centrosymmetric. The molecules are linked in two parallel independent chains by strong O—H...N hydrogen bonds. In one chain there is one independent O—H...N hydrogen bond [N...O = 2.557 (3) Å] and the molecules lie on centres of symmetry and are therefore constrained to have planar central portions. The second chain contains two independent O—H...N hydrogen bonds [O...N = 2.549 (3) and 2.581 (3) Å] and both molecules are twisted about their central bonds.

Electronic ISSN: 1600-5368

Topics: Chemistry and Pharmacology , Geosciences

Published by International Union of Crystallography

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