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Organic Compounds

All living things are formed mostly of carbon compounds called organic compounds. The category of organic compounds includes both natural and synthetic compounds that contain carbon. Although a single, precise definition has yet to be identified by the chemistry community, most agree that a defining trait of organic molecules is the presence of carbon as the principal element, bonded to hydrogen and other carbon atoms. However, some carbon-containing compounds such as carbonates, cyanides, and...
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Amino acids

Amino acids are the monomers that comprise proteins. Each amino acid has the same fundamental structure, which consists of a central carbon atom, or the alpha (α) carbon, bonded to an amino group (NH2), a carboxyl group (COOH), and to a hydrogen atom. Every amino acid also has another atom or group of atoms bonded to the central atom known as the R group. There are 20 common amino acids present in proteins, each with a different R group. Variation in the amino acid sequence is responsible for...
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Peptide Bonds

A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...
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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
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Carboxylic acid derivatives are formed by replacing the hydroxyl group of carboxylic acids with a different functional group. The most common carboxylic acid derivatives are:

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Los ligandos alfa-iminophospholide son los ligandos alfa-iminophospholide, los cuales se encuentran en el interior de

Joanna Grundy1, Bruno Donnadieu, François Mathey

  • 1UCR-CNRS Joint Research Chemistry Laboratory, Department of Chemistry, University of California Riverside, Riverside, California 92521-0403, USA.

Journal of the American Chemical Society
|June 15, 2006
PubMed
Resumen

Los investigadores sintetizaron nuevos ligandos alfa-iminophospholide de los iones phospholide y los cloruros de imidoil. Estos ligandos forman complejos con cloruros metálicos, con una significativa deslocalización electrónica y propiedades estructurales únicas.

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Área de la Ciencia:

  • Química organometálica Química orgánica de los metales.
  • Química del fósforo Química del fósforo
  • Coordinación Química de la Coordinación

Sus antecedentes:

  • Los iones fosfilo son nucleófilos versátiles en la química de los organofosforos.
  • Los cloruros de imidoil sirven como socios electrófilos para la formación de enlaces carbono-nitrógeno.

Objetivo del estudio:

  • Para sintetizar nuevos ligandos alfa-iminofosfólicos. para la síntesis de nuevos ligandos alfa-iminofosfólicos. para la síntesis de nuevos ligandos alfa-iminofosfólicos.
  • Para explorar la química de coordinación de estos ligandos con los cloruros metálicos.
  • Investigar las propiedades electrónicas y estructurales de los complejos resultantes.

Principales métodos:

  • Reacción de iones fosfilo con cloruros de imidoil en presencia de tert-butóxido de potasio (tBuOK).
  • Aislamiento de los derivados de trimethylstannyl de los alfa-iminophospholides.
  • Reacciones de complejación con varios cloruros metálicos.
  • Cálculos de la Teoría Funcional de la Densidad (DFT).
  • Cristalografía de rayos X. Cristalografía de rayos X.

Principales resultados:

  • Síntesis exitosa de alfa-iminophospholides y sus derivados trimethylstannyl.
  • Formación de complejos metálicos con los ligandos del título.
  • Los estudios de DFT revelaron una deslocalización electrónica significativa entre el grupo imino y el anillo fosfolílico.
  • La estructura de rayos X de un estanylfosforo mostró un átomo de fósforo altamente piramidal.
  • Se caracterizó estructuralmente un complejo de cobre tetramérico.

Conclusiones:

  • Los alfa-iminofosfoluros son ligandos accesibles para la química de la coordinación.
  • La estructura electrónica de estos ligandos exhibe una importante pi-delocalización.
  • Las características estructurales únicas, incluido el fósforo piramidal, son importantes para la formación de complejos.