Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Elke Niquet"'
Autor:
Otaciro R. Nascimento, Rafaela Bernardo Provazi Pesci, Elke Niquet, Victor M. Deflon, Rommel B. Viana, Eliseu J. de Souza
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The aim of this study is to perform an analysis of the spectroscopic and electronic properties of three vanadium(IV) complexes formed from bis(acetylacetonato)oxovanadium(IV) [VO(acac)2] and pyrid-2-one (2pyon) or pyrid-4-one (4pyon) ligands: [VO(aca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78b49ea3683ae0ad7b45443562bdde49
Publikováno v:
Zeitschrift für Naturforschung B. 70:91-94
2,3-Dihydro-4,5-diisopropyl-1,3-dimethylimidazol-2-ylidene (6) is prepared by reduction of the corresponding thion 7a with potassium. The selenium compound 7b is obtained from 6 and selenium. In the solid state, 7a and 7b exist as their isomers, as r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86387b745f472dd3ecce9668f7bb42b2
https://doi.org/10.1515/znb-2014-0191
https://doi.org/10.1515/znb-2014-0191
Autor:
Fernando Rogério Pavan, Eduardo E. Castellano, Clarice Queico Fujimura Leite, Sebastião S. Lemos, Alzir A. Batista, Gerimário F. de Sousa, Javier Ellena, Elke Niquet, Victor M. Deflon, Otaciro R. Nascimento, Pedro I. S. Maia
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The development of more efficient anti-tuberculosis drugs is of interest. Three oxovanadium(IV) and three cis-dioxovanadium(V) complexes with thiosemicarbazone derivatives bearing moieties with different lipophilicity have been prepared and had their
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da292101397d6d191ab233f21bfca811
https://doi.org/10.1016/j.poly.2008.11.017
https://doi.org/10.1016/j.poly.2008.11.017
Autor:
Ana Mena Barreto Bastos, Heloisa Beraldo, Alzir A. Batista, Pedro I. S. Maia, Elke Niquet, Adaliene Versiani Matos Ferreira, Jeferson G. Da Silva, Victor M. Deflon, Leida Maria Botion
Publikováno v:
Polyhedron. 27:1787-1794
Reaction of 2-acetylpyridine semicarbazone (H2APS), 3-acetylpyridine semicarbazone (H3APS) and 4-acetylpyridine semicarbazone (H4APS) with [VO(acac)2] (acac = acetylacetonate) gave [VO(H2APS)(acac)2] (1), [VO(H3APS)(acac)2] (2) and [VO(4APS)(acac)(H2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22c59228d20023a4d9659d5ec3449705
https://doi.org/10.1016/j.poly.2008.02.014
https://doi.org/10.1016/j.poly.2008.02.014
Autor:
Sebastia–o S. Lemos, Alzir A. Batista, Otaciro R. Nascimento, Gerimário F. de Sousa, Elke Niquet, Victor M. Deflon, Pedro I. S. Maia
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Three novel vanadium complexes with pharmacologically active ligands were synthesized and characterized: [VIVO(acac)(Hhasc)], [VIVO2(H2hasc)], and [VVO2(Hhasc)], where H2hasc = 2-Hydroxy-acetophenone-semicarbazone. The analytical methods used include
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9bdc14d00e953df2b2d33c67df2bb107
https://doi.org/10.1002/zaac.200600396
https://doi.org/10.1002/zaac.200600396
Publikováno v:
Zeitschrift für Naturforschung B. 61:207-212
The base catalyzed condensation reaction between 4-hydroxycoumarin and 3-acetylcoumarin (3-benzoylcoumarin) in water at reflux led to the formation of 1-methyl (1-phenyl)- benzopyrano[4’,3’-c]-benzo[3”,4”-ƒ ]-2,8-dioxabicyclo[3.3.1]nonane (2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9d5cf442c240cdc6d4bb247c13ed7f4
https://doi.org/10.1515/znb-2006-0216
https://doi.org/10.1515/znb-2006-0216
Autor:
Victor M. Deflon, Cassia C. de Sousa Lopes, Karl E. Bessler, Lincoln L. Romualdo, Elke Niquet
Publikováno v:
Zeitschrift für Naturforschung B. 61:33-36
The so far unknown lead tricyanomethanide, Pb[C(CN)3]2, was obtained from a saturated aqueous solution of PbCl2 and solid AgC(CN)3. Its IR spectrum and thermal behaviour are described. The crystal structure was determined by single-crystal X-ray diff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78e44d5c03df6163b8c44a60eff35cb4
https://doi.org/10.1515/znb-2006-0107
https://doi.org/10.1515/znb-2006-0107
Autor:
Carlos A. L. Filgueiras, Gerimário F. de Sousa, Luis Carlos C. Manso, Elke Niquet, Leonardo S. Lang, Victor M. Deflon
Publikováno v:
Journal of Molecular Structure. 753:22-26
The reaction of HAchexim with SnMeCl 3 and SnPhCl 3 yielded [SnMe(Achexim)Cl 2 ] ( 1 ) and [SnPh(Achexim)Cl 2 ] ( 2 ), respectively. The complexes were characterized by IR, NMR ( 1 H, 13 C) spectroscopic methods, elemental analysis and X-ray crystal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca1d1a40ff6a5dfb3c03d1cbc591206c
https://doi.org/10.1016/j.molstruc.2005.06.015
https://doi.org/10.1016/j.molstruc.2005.06.015
Publikováno v:
Zeitschrift für Naturforschung B. 60:924-928
1,3-Dimethylbarbituric acid (1, R = Me) reacts with aqueous formaldehyde in the presence of pyridine to give 1,3-dimethyl-2,4,6-trioxo-5-pyridinomethyl-1,3-perhydrodiazin-5-ylpyridinium ylide (6) in good yield. From 6 and 2,3-dihydro-1,3-diisopropyl-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15a764518c41548e2611c649951cf154
https://doi.org/10.1515/znb-2005-0902
https://doi.org/10.1515/znb-2005-0902
1,3-Dimethylbarbiturat-Salze organischer Kationen / 1,3-Dimethylbarbiturate Salts of Organic Cations
Publikováno v:
Zeitschrift für Naturforschung B. 60:715-719
The barbiturate salts 2-amino-1,3-dimethylimidazolium N,N’-dimethylbarbiturate (8) and 1,3- diisopropyl-4,5-dimethylimidazolium N,N’-dimethylbarbiturate (10) are obtained from N,N’- dimethylbarbituric acid (6) and 2-imino-1,3-dimethylimidazolin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75387cab773139531c4f061ebf14a62f
https://doi.org/10.1515/znb-2005-0703
https://doi.org/10.1515/znb-2005-0703