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Novos polímeros de coordenação e complexos moleculares envolvendo seleninatos e selenonatos
(Universidade Federal de Santa Maria, 2012-07-03)
In this work thirteen new compounds were synthesized and characterized using the
two acids, phenylseleninic (1) and 4-bromophenylseleninic (2) as ligands precursors.
Reactions were carried out using ammonium salts of ...
Aplicação da amostragem direta-GF AAS para a determinação de elementos traço em metérias-primas para a produção de poliuretanos
(Universidade Federal de Santa Maria, 2010-02-04)
Polymeric diphenylmethane diisocyanate (PMDI) and diphenylthane dianiline (MDA) are importante raw materials in the manufacture of polyurethanes. These products have wide application in various fields such as medicine, ...
Estudo do comportamento químico de heterociclos trifluormetil substituídos em reações com DAST
(Universidade Federal de Santa Maria, 2011-03-01)
This work describes the study of the chemical behavior of trifluoromethyl substituted heterocycles as 1H-pyrazoles, 2-pyrazolines, 2H-cromenones and isoxazolines in reactions with DAST, with the aim of evaluating possible ...
Síntese e bioatividade de sistemas pirazolil-piridínicos poli-heterocíclicos trialometil substituídos
(Universidade Federal de Santa Maria, 2015-03-02)
This thesis describes the studies carried out using the reagent 6-
hydrazinonicotinic hydrazide for the synthesis of new trihalomethylated pyrazolylpyridine
systems using the 4-alkoxy-4-alkyl(aryl/heteroaryl-1,1,1-trihal ...
Síntese de novas azinas trifluormetil substituídas e derivados a partir de reações de heterociclização de trifluoracetil enol éteres com diamino arenos
(Universidade Federal de Santa Maria, 2013-12-13)
The present research describes the study of synthetic strategies for obtaining of polyheterocyclic systems trifluoromethyl substituted from simple precursors: 4-alkoxy-1,1,1-trifluoroalk-3-en-2-ones (1), of formula ...
Síntese de novos isoxazóis e pirazóis a partir de derivados 1,3-diíno indólicos
(Universidade Federal de Santa Maria, 2015-04-06)
In this work it describe the synthesis and characterization of new 1,3-diynes indole derivatives, the 1,6-bis(1H-indol-1-yl)hexa-2,4-diynes (6 examples) and unsymmetrical 1-(5-arylpenta-2,4-diynyl)-1H-indoles (6 examples), ...
Avaliação da calibração em LA-ICP-MS usando papel filtro para análise de plantas
(Universidade Federal de Santa Maria, 2015-01-13)
In this work, a new calibration strategy was investigated for the determination of As, Ba, Cd,
Ce, Co, Cr, Cu, La, Mn, Ni, Pb, Se, Sr, Tl, V and Zn in medicinal plants by laser ablation and
inductively coupled plasma mass ...
Desemulsificação de petróleos assistida por ultrassom e posterior caracterização das fases água e óleo
(Universidade Federal de Santa Maria, 2011-08-19)
The effect of ultrasound (US) for demulsification of crude oils with different
characteristics (viscosity, density e water content) was investigated, without using
chemical demulsifier. Initially, the treatment using US ...
Síntese regiosseletiva de 2-metiltiopirimidin-4(3h)-onas N3-substituídas, uracilas derivadas e bromacil análogos
(Universidade Federal de Santa Maria, 2014-01-31)
A series of twenty-seven 3,6-disubstituted 2-methylthiopyrimidin-4(3H)-ones that have as substituents at 6 position of the pyrimidine ring the groups Me, Ph, 4-Me-C6H4, 4-OMe-C6H4, 4-F-C6H4, 4-Br-C6H4 and at 3 position the ...
Síntese de Calcogenofenos e Isoquinolinas via Reações de Ciclização Intramolecular
(Universidade Federal de Santa Maria, 2013-11-26)
In the first part of this work, a series of selenophenes and tellurophenes were prepared starting from of (Z)-chalcogenoenynes, by employing FeCl3 diorganyl dichalcogenide-mediated intramolecular cyclization. In general, ...