Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Vera L. S. Freitas"'
Publikováno v:
Molecules, Vol 28, Iss 18, p 6686 (2023)
The enthalpies of formation in the gaseous phase of methyl 3-methylanthranilate and methyl 5-methylanthranilate were determined from experimental measurements of the corresponding standard energies of combustion, obtained from combustion calorimetry,
Externí odkaz:
https://doaj.org/article/0a33e5f0fd2a4ec1882e717634bc6a70
Autor:
Juan Mentado-Morales, Arturo Ximello-Hernández, Javier Salinas-Luna, Vera L. S. Freitas, Maria D. M. C. Ribeiro da Silva
Publikováno v:
Molecules, Vol 27, Iss 2, p 381 (2022)
The thermochemical study of the 1,3-bis(N-carbazolyl)benzene (NCB) and 1,4-bis(diphenylamino)benzene (DAB) involved the combination of combustion calorimetric (CC) and thermogravimetric techniques. The molar heat capacities over the temperature range
Externí odkaz:
https://doaj.org/article/92e9045e6ac045c4a1c9d98e5733c6b6
Publikováno v:
Molecules, Vol 25, Iss 17, p 3827 (2020)
The energy involved in the structural switching of acyl and hydroxyl substituents in the title compounds was evaluated combining experimental and computational studies. Combustion calorimetry and Knudsen effusion techniques were used to determine the
Externí odkaz:
https://doaj.org/article/f904929b6cb14aaeb1bd2ef69c49ba29
Publikováno v:
Molecules, Vol 23, Iss 11, p 2962 (2018)
The present work addresses computational research focused on the energetic and structural properties of four isomers monohydroxyxanthone, using the G3(MP2)//B3LYP method, in order to evaluate the influence of the hydroxyl (—OH moiety) functional gr
Externí odkaz:
https://doaj.org/article/b2179edea3434f2ea2ebd69dabe69d8b
Publikováno v:
Química Nova, Vol 36, Iss 6, Pp 840-847 (2013)
The present article involves a comparative study of the influence of oxygen or sulfur heteroatoms present in the central ring of polycyclic compounds, in order to clarify the correlation between the respective thermophysical or thermochemical propert
Externí odkaz:
https://doaj.org/article/8321f74622394078a76fc7abb72a1263
Autor:
Juan, Mentado-Morales, Arturo, Ximello-Hernández, Javier, Salinas-Luna, Vera L S, Freitas, Maria D M C, Ribeiro da Silva
Publikováno v:
Molecules
The thermochemical study of the 1,3-bis(N-carbazolyl)benzene (NCB) and 1,4-bis(diphenylamino)benzene (DAB) involved the combination of combustion calorimetric (CC) and thermogravimetric techniques. The molar heat capacities over the temperature range
Autor:
Miguel L F Viveiros, Vera L S Freitas, Nuno Vale, Jose R B Gomes, Paula Gomes, Maria D M C R Ribeiro da Silva
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
The synthesis of three new quinoxaline mono-N-oxides derivatives, namely, 2-tert-butoxycarbonyl-3-methylquinoxaline-N-oxide, 2-phenylcarbamoyl-3-ethylquinoxaline-N-oxide, and 2-carbamoyl-3-methylquinoxaline-N-oxide, from their corresponding 1,4-di-N-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::098ee380133a9c916ddd541a4025d7f4
https://repositorio-aberto.up.pt/handle/10216/84716
https://repositorio-aberto.up.pt/handle/10216/84716
The standard molar enthalpies of formation, at T = 298.15 K, of all possible single methylated derivatives of benzothiophene and dibenzothiophene were calculated by means of the G3(MP2)//B3LYP approach employing several different working reactions (h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______1406::d34049e24d25a93e2ba2b08aa46b9771
https://hdl.handle.net/10216/97405
https://hdl.handle.net/10216/97405
Autor:
Juan Z. Dávalos, Maria das Dores M. C. Ribeiro da Silva, Manuel A. V. Ribeiro da Silva, Vera L. S. Freitas, Pilar Jiménez, Maria Victoria Roux, Pilar Cabildo, Rosa M. Claramunt, José Elguero
Publikováno v:
Journal of Physical Chemistry A; Sep2010, Vol. 114 Issue 34, p9237-9245, 9p