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| Ertürk, Emre |
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| Azevedo, Nuno Monteiro |
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Espeau, Philippe
Unité de Technologies Chimiques et Biologiques pour la Santé
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Publications (5/5 displayed)
- 2017Determination of the glass transition temperature of difficult samples by Flash DSC
- 2016Crystal structure determination and thermal behavior upon melting of p-synephrinecitations
- 2013Crystallographic and Pressure-Temperature State Diagram Approach for the Phase Behavior and Polymorphism Study of Glutaric Acidcitations
- 2011Physicochemical Stability of Solid Dispersions of Enantiomeric or Racemic Ibuprofen in Stearic Acidcitations
- 2011Solid-State Characterization of Enantiomeric and Racemic Hydrated and Anhydrous Zinc-Pidolate Complexescitations
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article
Crystal structure determination and thermal behavior upon melting of p-synephrine
Abstract
The crystal structure of p-synephrine was solved from a high-resolution X-ray powder diffraction pattern optimized by energy-minimization calculations using the Dreiding force field. The title compound crystallizes in a monoclinic system (space group P2 1 /c, Z = 4, with a = 8.8504(11) Å, b = 12.1166(15) Å, c = 9.7820(11) Å,  = 122.551(2) • , V = 884.21(19) Å 3 and d = 1.256 g cm −3). Since p-synephrine degrades upon melting, its melting data were determined from DSC experiments carried out as a function of the heating rate. This method allowed determining a melting temperature and enthalpy equal to 199.8 ± 1.3 • C and 57 ± 3 kJ mol −1 , respectively.