Search Results - "Matos Beja, A."

Pyrazinamide-Diflunisal: A New Dual-Drug Co-Crystal by Évora, António O. L, Castro, Ricardo A. E, Maria, Teresa M. R, Rosado, Mário T. S, Ramos Silva, M, Matos Beja, A, Canotilho, João, Eusébio, M. Ermelinda S

“…A 1:1 co-crystal involving pyrazinamide, one of the first-line drugs recommended by the World Health Organization for tuberculosis treatment, and diflunisal, a…”
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Erythritol: Crystal growth from the melt by Lopes Jesus, A.J., Nunes, Sandra C.C., Ramos Silva, M., Matos Beja, A., Redinha, J.S.

“…The structural changes occurring on erythritol as it is cooled from the melt to low temperature, and then heated up to the melting point have been investigated…”
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Conformational Isomorphism of Organic Crystals:  Racemic and Homochiral Atenolol by Esteves de Castro, R. A, Canotilho, João, Barbosa, Rui M, Silva, M. Ramos, Beja, A. Matos, Paixão, J. A, Redinha, J. Simões

“…X-ray diffraction analysis of (R,S)- and S-atenolol crystalline forms was performed. The crystals studied were grown from evaporation of an ethanol/water…”
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Polymorphism of trans-1,4-Cyclohexanediol: Conformational Isomorphism by Maria, Teresa M. R, Castro, Ricardo A. E, Bebiano, Suse S, Ramos Silva, M, Matos Beja, A, Canotilho, João, Eusébio, M. Ermelinda S

“…In this work, an investigation on the polymorphism of trans-1,4-cyclohexanediol is performed. Polymorph screening is carried out by crystallization from…”
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Guanidinium 4-aminobenzoate by Pereira Silva, P. S., Ramos Silva, M., Paixão, J. A., Matos Beja, A.

“…In the title compound, CH6N3+·C7H6NO2−, the cation and anion lie on crystallographic mirror planes. The 4-aminobenzoate anion is almost in a planar…”
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Crystal and Molecular Structure of 4,6-Bis(nitroimino)-1,3,5-triazinan-2-one:  Theoretical and X-ray Studies by Simões, P. N, Pedroso, L. M, Matos Beja, A. M, Silva, M. Ramos, MacLean, Elizabeth, Portugal, A. A

“…This paper provides an overview of recent progress on structural data on the title compound. Theoretical work based on quantum mechanical calculations was…”
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Study of Nα-benzoyl-L-argininate ethyl ester chloride, a model compound for poly(ester amide) precursors: x-ray diffraction, infrared and Raman spectroscopies, and quantum chemistry calculations by Fonseca, A C, Jarmelo, S, Silva, M Ramos, Beja, A M Matos, Fausto, R, Gil, M H, Simões, P N

“…Poly(ester amide)s (PEAs) are lacking in structural and spectroscopic information. This paper reports a structural and spectroscopic characterization of…”
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1,5-Bis(2,5-dimethyl-1H-pyrrol-1-yl)naphthalene by Santos, A C, Ramos Silva, M, Monsanto, P V, Matos Beja, A, Sobral, A J F N

“…In the title compound, C(22)H(22)N(2), the asymmetric unit contains one half-mol-ecule. A crystallographic inversion centre is located at the mid-point of the…”
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A New Insight into Pyrazinamide Polymorphic Forms and their Thermodynamic Relationships by Castro, Ricardo A. E, Maria, Teresa M. R, Évora, António O. L, Feiteira, Joana C, Silva, M. Ramos, Beja, A. Matos, Canotilho, João, Eusébio, M. Ermelinda S

“…Screening of pyrazinamide polymorphs was carried out by crystallization from solvents differing in polarity and hydrogen bonding ability and also by…”
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Bis(triphenylguanidinium) tetrachloridocuprate(II) by Pereira Silva, P. S., Martins, N. D., Ramos Silva, M., Matos Beja, A.

“…The structure of the title compound, (C19H18N3)2[CuCl4], consists of square-planar [CuCl4]2− anions and triphenylguanidinium cations. The CuII ion occupies a…”
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Crystal structure of L-tryptophanium phosphite, (C11H13N2O2)[H2PO3] by Silva M. Ramos, Paixão J. A., Beja A. Matos

“…C11H15N2O5P, orthorhombic, P212121 (no. 19), a = 5.5442(6) Å, b = 8.3603(4) Å, c = 27.427(3) Å, V = 1271.3 Å3, Z = 4, Rgt(F) = 0.053, wRref(F2) = 0.146, T =…”
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Two anilinium salts: anilinium hydrogenphosphite and anilinium hydrogenoxalate hemihydrate by Paixão, J. A., Matos Beja, A., Ramos Silva, M., Martin-Gil, J.

“…In the title compounds, C6H5NH3+·H2PO3− and C6H5NH3+·C2HO4−·0.5H2O, the NH3+ groups of the anilinium ion are ordered at room temperature. The rotation of these…”
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Crystal structure of 2-hydroxyimino-3-oxo-3-phenyl-propionic acid ethyl ester, C11H11NO4 by Ramos Silva M., Matos Beja A., Paixão J. A., Lopes S. H., Cabral Ana M. T. D. P. V., Rocha Gonsalves A. M. d′A., Sobral A. J. F. N.

“…C11H11NO4, orthorhombic, Pna21 (no. 33), a = 18.370(4) Å, b = 4.870(1) Å, c = 24.616(2) Å, V = 2202.4 Å3, Z = 8, Rgt(F) = 0.082, wRref(F2) = 0.203, T = 293 K…”
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17-Oxo-5α-androst-6-en-3β-yl acetate by Paixão, J. I. F., Salvador, J. A. R., Paixão, J. A., Matos Beja, A., Ramos Silva, M., Rocha Gonsalves, A. M. d'A.

“…In the title compound, C21H30O3, a potential inhibitor of aromatase, all rings are fused trans. Rings A and C have chair conformations which are slightly…”
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Crystal structure of 2-hydroxyimino-3-oxo-3-phenyI-propionic acid ethyl ester, C11H11NO4 by Ramos Silva M., Matos Beja A., Paixáo J. A., Lopes S. H., Cabral Ana M. T. D. P. V., Rocha Gonsalves A. M. d'A., Sobral A. J. F. N.

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Density functional and X-ray diffraction studies of two polymorphs of N, N′, N″-triphenylguanidine by Pereira Silva, P.S., Cardoso, C., Ramos Silva, M., Paixão, J.A., Matos Beja, A., Nogueira, F.

“…The crystal structure of a new phase of triphenylguanidine has been solved by X-ray diffraction. The crystals are monoclinic, space group P 2 1 / c , with a =…”
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Crystal structure of 4-ethyl-3,5-dimethyl-1H-pyrolle-2-carboxylic acid ethyl ester, C11H17NO2 by Paixāo J. A., Matos Beja A., Ramos Silva M., Alte da Veiga L., Sobral A. J. F. N., Lopes S. H., Rocha Gonsalvesn Α. Μ. d’A.

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The structure of betaxolol from single crystal X-ray diffraction and natural bond orbital analysis by Canotilho, João, Castro, Ricardo A.E., Rosado, Mário T.S., Ramos Silva, M., Matos Beja, A., Paixão, J.A., Simões Redinha, J.

“…The structure of betaxolol obtained from ethanol:water solution was studied by X-ray diffraction. The geometrical parameters needed to define the structure are…”
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Experimental and ab-initio studies of the spectroscopic properties of N, N′, N″-triphenylguanidine and N, N′, N″-triphenylguanidinium chloride by Cardoso, C., Pereira Silva, P.S., Ramos Silva, M., Matos Beja, A., Paixão, J.A., Nogueira, F., Sobral, A.J.F.N.

“…Triphenylguanidinium chloride was synthesized and the corresponding infrared (IR) spectra was measured. Four different conformers of triphenylguanidine, two…”
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Crystal structure of bis(diphenylguanidinium) pentafluorovanadate, (C13H14N3)2VF5 by Silva M. Ramos, Beja A. Matos, Paixäo J. A., Veiga L. Alte da

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