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Chemical Reactions in Aqueous Solutions03:03

Chemical Reactions in Aqueous Solutions

Chemical substances interact in many different ways. Certain chemical reactions exhibit common patterns of reactivity. Due to the vast number of chemical reactions, it becomes necessary to classify them based on the observed patterns of interaction.
Structure of Amines01:19

Structure of Amines

The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’ carbon–carbon bond (154 pm). These aspects are illustrated in Figure...
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview01:26

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview

Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by water loss...
Coordination Compounds and Nomenclature02:54

Coordination Compounds and Nomenclature

In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
Exceptions to the Octet Rule02:55

Exceptions to the Octet Rule

Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:

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Updated: Jun 26, 2026

Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
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Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers

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El anión binario de nitrógeno de plata es [Ag(N3) 2] - .

Thomas M Klapötke1, Burkhard Krumm, Matthias Scherr

  • 1Department of Chemistry and Biochemistry, Ludwig-Maximilian University of Munich, Butenandtstrasse 5-13(D), D-81377 Munich, Germany.

Journal of the American Chemical Society
|January 9, 2009
PubMed
Resumen
Este resumen es generado por máquina.

Los investigadores sintetizaron un nuevo compuesto de plata-nitrógeno, el anión diazido-argentato (I), reaccionando azido de plata con azidos específicos. La elección catiónica influye en la coordinación de los iones azida alrededor de la plata en las estructuras cristalinas resultantes.

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Área de la Ciencia:

  • Química Inorgánica La Química Inorgánica es la química inorgánica.
  • Ingeniería de Cristal Ingeniería de Cristal.
  • Coordinación Química de la Coordinación

Sus antecedentes:

  • La azida de plata es un material energético conocido y precursor en química de coordinación.
  • El comportamiento de coordinación de la plata (I) con los ligandos azidas es de interés para la síntesis de nuevos materiales.
  • Estudios anteriores han explorado varios compuestos de plata-nitrógeno, pero el anión diazido-argentato (I) no fue caracterizado.

Objetivo del estudio:

  • Para sintetizar y caracterizar el nuevo anión diazido-argentato (I), [Ag (N) (III) (II) ] (II) (I).
  • Para investigar la influencia de diferentes contra-cationes en la estructura cristalina y el entorno de coordinación del anión.
  • Para explorar la formación de compuestos binarios de plata-nitrógeno a través de reacciones que involucran azida de plata.

Principales métodos:

  • Reacción del azido de plata con el azido de trifenilsulfonio y el azido de tetrafenilfosfonio.
  • Análisis de difracción de rayos X monocristalino para determinar las estructuras cristalinas de las sales sintetizadas.
  • Caracterización espectroscópica (por ejemplo, espectroscopia de infrarrojos) para confirmar la presencia del ligando azida y el anión [Ag(N(3))(2)](-) anión.

Principales resultados:

  • Síntesis exitosa de dos nuevas sales que contienen el anión diazido-argentato (I), [Ag (N) (III) (II) ] (I-).
  • La determinación de la estructura cristalina reveló distintas geometrías de coordinación de los ligandos azidas alrededor del centro de la plata, dependiendo del catión (trifenilsulfonio o tetrafenilfosfonio).
  • El ión de plata (I) está coordinado por dos ligandos de azida, formando un anión lineal o ligeramente doblado [Ag (N) (III) (II) ] (I) ] en estado sólido.

Conclusiones:

  • El anión diazido-argentato (I), [Ag (N) (III) (II) ], representa un nuevo compuesto binario de plata y nitrógeno.
  • La esfera de coordinación alrededor de la plata está significativamente influenciada por las propiedades estéricas y electrónicas del contra-catión.
  • Este estudio amplía la química conocida de los complejos de plata-azida y proporciona información sobre la ingeniería de cation-controlled cristal.