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Doctoral Thesis
DOI
10.11606/T.75.2006.tde-05062007-162938
Document
Author
Full name
Érica Tozzo
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2006
Supervisor
Committee
Santos, Regina Helena de Almeida (President)
Dockal, Edward Ralph
Mauro, Antonio Eduardo
Moreira, Wania da Conceição
Nardo, Regina Célia Galvao Frem di
Title in Portuguese
"Estudo experimental e teórico de compostos de bases de Schiff com cobre (II)"
Keywords in Portuguese
bases de Schiff
cobre(II)
estudos teóricos
Abstract in Portuguese
Neste trabalho inicialmente foi feita uma breve apresentação sobre a utilização de compostos de bases de Schiff e Cobre(II) como catalisadores na reação de oxidação de sulfetos. Foi feita a determinação das estruturas cristalinas dos compostos: N,N'-bis(3-etoxisalicilideno)-(1,2etileno- diamina) Cu(II), sistema cristalino ortorrômbico grupo espacial Pbcn a = 7.639(5); b= 12.760(5); c= 19.733(5)Å; V = 1923.4(15) (3)Å3; Dcalc = 1.505 Mg/m3; MM = 435.96; e m = 1.170 mm-1, N,N'-bis (4-dietilaminasalicilideno) - (1,2etilenodiamina) Cu(II), sistema monoclínico, C2/c, a = 19.571(2); b=9.8514(2)=; c=12.4552(4) Å; Beta = 93.705(9)o; V =2396.4(5) Å3; Dcalc=1.358 Mg.m-3; MM= 490.10; e m = 0.944 mm-1, N,N'-bis(3-metoxisalicilideno)-(1,2etilenodiamina)Cu(II), sistema ortorrômbico, Pna21, a = 7.5140(6); b= 9.2629(9); c= 24.721(3)Å; V =1720.6(3) Å3; Dcalc = 1.575 Mg,m-1; MM = 407.91; e m = 1.302 mm1 e (SALAHE)Cu(II), monoclínico, P21/C, a = 18.3216(2) Å; b=4.804(3) Å; c=19.801(2)Å; Beta = 98.908(6)o; V =2396.4(5) Å3; Dcalc=1.358 Mg.m-3; MM= 490.10; e m = 0.944 mm-1. Os cálculos teóricos para as quatro moléculas foram efetuados partindo-se das coordenadas atômicas cristalográficas. Foram modeladas, para posterior estudo teórico, as moléculas de vinte e seis compostos de bases de Schiff e Cobre(II) análogos. Foram calculadas 104 variáveis para cada composto, e realizado o estudo de correlação estrutura-atividade catalítica através de métodos de Quimiometria. Foi obtido um modelo de correlação utilizando a classe de compostos de atividade catalítica pré-definida. Finalmente foi realizada a tentativa de previsão de atividade dos vinte e quatro compostos com atividade não conhecida, obtendo-se como resultado a probabilidade de vinte deles serem ativos como catalisadores da conversão sulfeto-sulfóxido .
Title in English
"Experimental and theoretical studies on copper(II) Schiff Bases"
Keywords in English
copper(II)
Schiff bases
theoretical studies
Abstract in English
Initially, in this work, a brief presentation about Schiff bases and their applications as catalysist. The crystalline structure determination was made for the compounds: N,N'-bis(3-etoxysalicylidene)- (1,2ethylenediamine) Cu(II), crystal system orthorhombic spatial group Pbcn a = 7.639(5); b= 12.760(5); c= 19.733(5)Å; V = 1923.4(15) (3)Å3; Dcalc = 1.505 Mg/m3; MM = 435.96; e m = 1.170 mm-1, N,N'-bis (4- diethylaminesalicilidene) - (1,2ethylenediamine) Cu(II), monoclinic, C2/c, a = 19.571(2); b=9.8514(2)=; c=12.4552(4) Å; B= 93.705(9)o; V =2396.4(5) Å3; Dcalc=1.358 Mg.m-3; MM= 490.10; e m = 0.944 mm-1, N,N'-bis(3-metoxysalicilidene)- (1,2ethylenediamine) Cu(II), orthorhombic, Pna21, a = 7.5140(6); b= 9.2629(9); c= 24.721(3)Å; V =1720.6(3) Å3; Dcalc = 1.575 Mg,m-1; MM = 407.91; e m = 1.302 mm1 e (SALAHE)Cu(II), monoclinic, P21/C, a = 18.3216(2) Å; b=4.804(3) Å; c=19.801(2)Å; B= 98.908(6)o; V =2396.4(5) Å3; Dcalc=1.358 Mg.m-3; MM= 490.10; e m = 0.944 mm-1. The theoretical calculations for the four molecules had been effected starting of the crystallographic atomic coordinates. Twenty-six molecules without determined crystallographic structure had been shaped for theoretical study. 104 variables for each compound had been calculated, and carried through the correlation study structure-catalyst activity through chemometric methods. A separation model was gotten in one single class. Finally the attempt of forecast of activity of twenty four compounds with activity unknown was carried through, getting itself as resulted the probability of twenty in all to be able to become active.
 
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EricaTozzo.pdf (7.07 Mbytes)
Publishing Date
2007-06-11
 
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