Flaviana Tavares Vieira - Academia.edu (original) (raw)

Papers by Flaviana Tavares Vieira

An entry from the Cambridge Structural Database, the world's repository for small molecule cr... more An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Main Group Metal Chemistry, 2004

A series of organotin(IV) derivatives of N, N'-bis(2-pyridil)oxalamide (pod) has been prepared in... more A series of organotin(IV) derivatives of N, N'-bis(2-pyridil)oxalamide (pod) has been prepared in ethanol affording [SnCl 2 R 2 (pod)] (R = phenyl 2, butyl 4, vinyl 7), [SnClR 3 (pod)] (R = phenyl 3, butyl 5) and (SnCl;,R(pod)] (R-butyl 6). The products were characterised by techniques such as multinuclcar NMR ('Η, n C{H}, liy Sn{H}) infrared and " 9 Sn Mössbauer spectroscopy, thermogravimetry analysis (TG), melting point and microanalysis. The overall data point out the formation of six-coordinate Sn(IV) nucleus with the ligand performing a cis-and ira/is-configuration with respect to the central oxalamide CC bond. U C NMR strongly indicates retention of the Sn-0 bond in solution for complex 7 but not for 6, which switches over to an Sn-N bond while the opposite has been revealed in the case of 5. In all complexes, the ligand is acting in a bidentate coordination mode by means of bonding the Sn(IV) centre through the nitrogen or oxygen atoms.

Main Group Metal Chemistry, 2008

The complexes [Sn{S 2 CN(CH 2)4} 2 Cl 2 ], 1, [Sn{S 2 CN(CH 2) 4 } 2 Ph 2 ] {Ph=phenyl}, 2, [Sn{S... more The complexes [Sn{S 2 CN(CH 2)4} 2 Cl 2 ], 1, [Sn{S 2 CN(CH 2) 4 } 2 Ph 2 ] {Ph=phenyl}, 2, [Sn{S 2 CN(CH 2) 4 }Ph 3 ], 3, [Sn{S 2 CN(CH 2) 4 } 2 n-Bu 2 ] {«-Bu=«-butyl}, 4, [Sn{S 2 CN(CH 2) 4 }Cy 3 ] {Cy=Cyclohexyl}, 5, [Sn{S 2 CN(C 2 H 5) 2 } 2 Cl 2 ], 6, [Sn{S 2 CN(C 2 H 5) 2 } 2 Ph 2 ], 7, [Sn{S 2 CN(C 2 H 5) 2 }Ph 3 ], 8, [Sn{S 2 CN(C 2 H 5) 2 } 3 Ph], 9 and [Sn{S 2 CN(C 2 H 5) 2 }Cy 3 ], 10 were used in this work. The in vitro antibacterial activity study was performed against Staphylococcus aureus (ATCC 25923) and all complexes were active. The activity was measured in terms of inhibition zones (mm) and minimum inhibitory concentration test, MIC ^g mL' 1). In terms of inhibition zones compounds 6 and 9 presented the best results. Complexes where the-SnPh 3 moiety is present possess the smaller MIC values. The apparent contradiction of the tests might be related to diffusion properties of the organotin complexes.

Main Group Metal Chemistry, 2008

Equimolar reactions between organotin(IV) precursors of SnCl x R 4. x (R = Bu, Ph, χ = 1, 4) and ... more Equimolar reactions between organotin(IV) precursors of SnCl x R 4. x (R = Bu, Ph, χ = 1, 4) and aminoguanidine bicarbonate in methanol has afforded 2:1 and 1:1 (M:L) carbonate complexes as well as 1:2 semicarbazide derivative. The products were characterised by spectroscopic methods such as multinuclear NMR ('Η, i3 C and ll9 Sn), Müssbauer and infrared spectroscopy as well as microanalysis and melting point. The butyl and phenyl derivatives have a 4-and 5-coordinated metal centre respectively with bridgingbidentate and bridging-tridentate carbonate. For the tetrahalide metal precursor, a 6-coordinated tin(IV) derivative has been achieved with a bidentate semicarbazide towards the metal centre.

Anais dos Encontros Nacionais de Engenharia e Desenvolvimento Social - ISSN 2594-7060, Dec 1, 2012

Colabora??o: Flaviana Tavares Vieira.Revis?o: Alessandra Stella, Andr? Covre.Ilustra??o: alunos d... more Colabora??o: Flaviana Tavares Vieira.Revis?o: Alessandra Stella, Andr? Covre.Ilustra??o: alunos do 3? ano do ensino fundamental de Diamantina, MG - E. E. Professora Izabel Motta.Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM

V?deo em braile. Com legendas em portugu?s.Funda??o de Amparo ? Pesquisa do estado de Minas Gerai... more V?deo em braile. Com legendas em portugu?s.Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM

Colabora??o: Vivian Benassi.Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Univ... more Colabora??o: Vivian Benassi.Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM

Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Universidade Federal dos Vales d... more Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM

Colabora??o:Flaviana Tavares Vieira e Andr? Covre.Ilustra??o: alunos do 4? ano do ensino fundamen... more Colabora??o:Flaviana Tavares Vieira e Andr? Covre.Ilustra??o: alunos do 4? ano do ensino fundamental de E. E. Maria Augusta Caldeira Brant - Diamantina, MG.Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM

Ilustra??o: alunos do 6? ano do ensino fundamental de E. E. Leopoldo Miranda - Diamantina, MG.Fun... more Ilustra??o: alunos do 6? ano do ensino fundamental de E. E. Leopoldo Miranda - Diamantina, MG.Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG)Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM

Main Group Metal Chemistry, 2004

Main Group Metal Chemistry, 2008

Anais dos Encontros Nacionais de Engenharia e Desenvolvimento Social - ISSN 2594-7060, Dec 1, 2012