Análise de dados de RMN, deslocamentos químicos e constantes de acoplamento do sistema de hidrogênios ABX em 3,5-diaril-4,5-diidro-1H-pirazóis

• Ano de defesa: 2012
• Autor(a) principal: Disconzi, Francieli Baccim
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• dARK ID: ark:/26339/00130000167zd
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; BR; Química; UFSM; Programa de Pós-Graduação em Química
• Palavras-chave em Português: Deslocamento químico; Constante de acoplamento; Raios-X; 4,5-diidro-1H-pirazóis; Chemical shift; Coupling constant; X-rays; 4,5-dihydro-1H-pyrazoles; CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA
• Link de acesso: http://repositorio.ufsm.br/handle/1/10521

This dissertation first describes the collection of literature data among the years 2005 to 2011 for the subsequent data analysis of 1H NMR chemical shifts and coupling constants and 2JHH 3JHH with emphasis on the synthesis of 3,5-diaryl-4,5-dihydro-1H-pyrazoles. Initially, was analyzed the data from X-ray diffraction of compounds 4,5-dihydro-1H-pyrazoles with a focus on the molecular structure description. Posteriorly, the X-rays data was correlated with the 1H NMR chemical shifts observing the influence of different substituents on the pyrazole ring. The coupling constants 2JHH 3JHH were correlated with bond angles and dihedral angles observed respectively for the molecules of 3,5-diaryl-4,5-dihydro-1H-pyrazoles.