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A study of the structure of the pindolol based on infrared spectroscopy and nat...
Castro, Ricardo A. E.; Canotilho, João; Nunes, Sandra C. C.; Eusébio, M. Ermelinda S.; Redinha, J. Simõeshttp://www.sciencedirect.com/science/article/B6VNG-4V1KMV6-1/2/37bbea9fe5940f0b4f9225e65592559b
The structure of betaxolol from single crystal X-ray diffraction and natural bo...
Canotilho, João; Castro, Ricardo A. E.; Rosado, Mário T. S.; Silva, M. Ramos; Beja, A. Matos; Paixão, J. A.; Redinha, J. SimõesThe structure of betaxolol obtained from ethanol:water solution was studied by X-ray diffraction. The geometrical parameters needed to define the structure are tabulated. The X-ray data show the existence of two conformers in the unit cell differing only in the conformation of the cyclopropylmethoxy fragment. Differences in the bond lengths angles and dihedral between both conformations are observed. The cyclop...
Phase transitions of 1,2-cyclohexanediol isomers studied by polarised light mic...
Leitão, Maria Luísa Planas; Castro, Ricardo A. E.; Costa, Felisbela S.; Redinha, J. S.Polarised light microscopy and DTA have been used to study the phase transitions observed in cis and trans-1,2-cyclohexanediol during heating/cooling cycles performed between ambient and melting temperatures to prove that the presence of impurities even in trace amounts can affect the thermal properties of the substances. Good quality commercial material before and after further purification were used in this s...
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