Abstract: The Institute of Chemistry of the National Autonomous University of Mexico (Spanish acronym: IQ-UNAM), at his 75th anniversary is known around the world as an important and solid institution. Catalysis is outlined as a very strong research field because of their importance in every area of applied chemistry. The development and understanding of several catalytic systems are encouraged among several researchers. IQ is fully equipped with cutting edge technology suitable for basic and applied research in catalysis and related fields. This capability and the strong presence in several graduate programs have an impact in the number of high quality publications, strong collaboration with industry, development of chemistry and high quality of human resources. A strong group of researchers explores and develop transition metal mediated process, design of chiral ligands and organocatalysis. The strong relations with other institutions worldwide makes the IQ the tip of the sword to achieve new discoveries in catalysis and one of the best places in the world to make chemistry.

Resumen: El Instituto de Química de la Universidad Nacional Autónoma de México (IQ-UNAM), a sus 75 años de existencia, se ha forjado como una institución sólida y de prestigio internacional. Recientemente, una de las líneas de investigación con mayor impacto en el IQ-UNAM, por su trascendencia en todas las áreas de la química, es la catálisis. En el IQ se cuenta con la infraestructura necesaria para llevar a cabo investigación básica y aplicada en el área de la catálisis homogénea. La participación de la institución en diversos programas de posgrado permite la generación de productos de investigación, proyectos en colaboración con la industria, la generación de conocimiento indispensable para la química y para nuestro país, así como la formación de recursos humanos de alta calidad. Dentro del IQ, un nutrido grupo de investigadores exploran y enriquecen líneas sobre catálisis mediada por metales de transición, el diseño de ligantes y auxiliares quirales, y organocatálisis. La capacidad de vinculación que ofrece el IQ con otras instituciones a nivel mundial lo convierten en la punta de lanza para nuevos descubrimientos en catálisis, transformándolo en uno de los mejores sitios en el mundo para desarrollar esta área de la química.

Neste trabalho foram estudados os efeitos eletrônicos induzidos por p-substituintes no anel fenilico de diversos compostos carbonílicos conjugados [4-p-R-fenil-1-(1,3-ditiolano-2-ilideno)-3 E-buteno-2-ona, onde R=NO2, Cl, Br, OMe, NEt2 (2-6)], e sua reatividade frente a Fe2(CO)9 usando o diagrama de Hammett. A estrutura dos compostos (3 e 4b) foi totalmente estabelecida por análise de difração de raio-X.

The electronic effects induced by p-substituents on the phenyl ring of several novel cross-conjugated carbonyl compounds [4-p-R-phenyl-1-(1,3-dithiolane-2-ylidene)-3 E-butene-2-one, where R= NO2, Cl, Br, OMe, NEt2 (2-6),] and their reactivity towards Fe2(CO)9 have been studied using a Hammett plot. The structure of two compounds (3 and 4b) was fully established by X-ray diffraction analysis.

Neste trabalho foram estudados os efeitos eletrônicos induzidos por p-substituintes no anel fenilico de diversos compostos carbonílicos conjugados [4-/>-R-fenil-1-(1,3-ditiolano-2-ilideno)-3E-buteno-2-ona, onde R=NO2, Cl, Br, OMe, NEt2 (2-6)], e sua reatividade frente a Fe2(CO)9 usando o diagrama de Hammett. А estrutura dos compostos (3 e 4b) foi totalmente estabelecida poranálise de difração de raio-X.

The electronic effects induced by p-substituents on the phenyl ring of several novel cross-conjugated carbonyl compounds [4-p-R-phenyl-1-(1,3-dithiolane-2-ylidene)-3E-butene-2-one, where R= NO2, Cl, Br, OMe, NEt2 (2-6),] and their reactivity towards Fe2(CO)9 have been studied using a Hammett plot. The structure of two compounds (3 and 4b) was fully established by X-ray diffraction analysis.