Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Paulo M. Nunes"'
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 100:381-384
The α-C–H bond dissociation enthalpy (BDE) in tetralin (1,2,3,4-tetrahydronaphtalene) was determined using time-resolved photoacoustic calorimetry as 357.6 ± 5.4 kJ mol−1. This value is some 10 kJ mol−1 higher than the only previous experimen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5508d4d1dc483dbb136282705fe76ea2
https://doi.org/10.1007/s10973-009-0632-0
https://doi.org/10.1007/s10973-009-0632-0
Autor:
Benedito J. Costa Cabral, Rui M. Borges dos Santos, Paulo M. Nunes, Filipe Agapito, José A. Martinho Simões
Publikováno v:
The Journal of Organic Chemistry. 73:6213-6223
The C-H bond dissociation enthalpies (BDEs) for the five- and six-membered ring alkanes, alkenes, and dienes were investigated and discussed in terms of conventional strain energies (SEs). New determinations are reported for cyclopentane and cyclohex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::924bcbaa0616ec48de93ab55a18989ab
https://doi.org/10.1021/jo800690m
https://doi.org/10.1021/jo800690m
Publikováno v:
International Journal of Chemical Kinetics. 38:357-363
The hydrogen-abstraction reaction from phenol by tert-butoxyl radical was used to test time-resolved photoacoustic calorimetry (TR-PAC) as a method to obtain kinetic data. Absolute rate constants for this reaction were determined in benzene and in th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f854713aa21d621b1227f288b5159a37
https://doi.org/10.1002/kin.20173
https://doi.org/10.1002/kin.20173
Publikováno v:
Thermochimica Acta. 420:3-11
A generalized method for the determination of thermochemical data of transient species, using time-resolved photoacoustic calorimetry (TR-PAC), is described in detail. Taking phenol as an example, the procedure for the determination of the PhO–H bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96f5b3d29822a91c69210844c9c87d3f
https://doi.org/10.1016/j.tca.2003.10.027
https://doi.org/10.1016/j.tca.2003.10.027
Publikováno v:
Frontiers in Marine Science, Vol 1 (2014)
Over the last years, algae have been increasingly used in Human food due their rich chemical and nutritional composition, particularly the high supply of essential nutrients to the human body such as protein and dietary fiber. Dietary fiber can be di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c08ef0dc1fe21d21b852f6f601fa0936
http://journal.frontiersin.org/Journal/10.3389/conf.fmars.2014.02.00003/full
http://journal.frontiersin.org/Journal/10.3389/conf.fmars.2014.02.00003/full
Autor:
Paulo M. Nunes, Jesús J. Pérez-Torrente, Luis F. Veiros, Alberto R. Dias, Miguel A. Ciriano, Manuel E. Minas da Piedade, José A. Martinho Simões, Palmira Ferreira da Silva, Luis A. Oro, M. Fátima M. Piedade
Publikováno v:
Structural Chemistry. 7:337-354
The energetics of the oxidative additive of I2 to [Ir(Μ-L)(CO)2]2 [L =t-buthylthiolate (S t Bu), 3,5-dimethylpyrazolate (3,5-Me2pz), and 7-azaindolate (7-aza)] complexes was investigated by using the results of reaction-solution calorimetric measure
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9ac3909782c329621e347dabed2fbe77
https://doi.org/10.1007/bf02275160
https://doi.org/10.1007/bf02275160
Publikováno v:
The Journal of Chemical Thermodynamics. 36:321-323
The standard molar enthalpy of formation of [Ti(η5-C5H5)2 (OOCCH2NH3)2]Cl2 in the crystalline state, at T=298.15 K, was determined as ΔfHm∘{[Ti(η5-C5H5)2(OOCCH2NH3)2]Cl2, cr}=−(1447.6 ± 8.1) kJ · mol−1, by reaction-solution calorimetry. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70ca737ccada7a34cec64c197f13c6d6
https://doi.org/10.1016/j.jct.2004.01.002
https://doi.org/10.1016/j.jct.2004.01.002
Publikováno v:
Thermochimica Acta. 249:113-120
A differential ebulliometric apparatus of the Swietoslawski type requiring ca. 10 cm 3 of sample is described. The application of this apparatus to the determination of enthalpies of vaporization was tested with cyclohexane and ethanol. The values ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49784ad1496576b7a16c32b5dd6d4dcb
https://doi.org/10.1016/0040-6031(95)90678-9
https://doi.org/10.1016/0040-6031(95)90678-9
Autor:
Benedito J. Costa Cabral, Filipe Agapito, Rui M. Borges dos Santos, Paulo M. Nunes, Sílvia G. Estácio, José A. Martinho Simões, Rui C Santos, Gustavo T Lopes
Publikováno v:
The journal of physical chemistry. A. 113(23)
The energetics of tert-butoxyl radical addition reaction to norbornadiene was investigated by time-resolved photoacoustic calorimetry (TR-PAC). The result, together with the C-O bond dissociation enthalpy (BDE) in the addition product, allowed us to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61863e0d7f96faeac2ddf4a4362aa036
https://pubmed.ncbi.nlm.nih.gov/19449831
https://pubmed.ncbi.nlm.nih.gov/19449831
Autor:
Sílvia G. Estácio, Paulo M. Nunes, Lopes Gt, Borges dos Santos Rm, Martinho Simões Ja, Costa Cabral Bj
Publikováno v:
Organic letters. 10(8)
Gas-phase C-H bond dissociation enthalpies (BDEs) in norbornane were determined by quantum chemistry calculations and the C2-H BDE was experimentally obtained for the first time by time-resolved photoacoustic calorimetry. CBS-Q and CBS-QB3 methods we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65cc1db9e9c5cff3f0bc22e5b15aa7e6
https://pubmed.ncbi.nlm.nih.gov/18348570
https://pubmed.ncbi.nlm.nih.gov/18348570