Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Stereoisomerism02:52

Stereoisomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
Coordination Number and Geometry02:57

Coordination Number and Geometry

For transition metal complexes, the coordination number determines the geometry around the central metal ion. Table 1 compares coordination numbers to molecular geometry. The most common structures of the complexes in coordination compounds are octahedral, tetrahedral, and square planar.
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Glycan-binding properties of SARS-CoV-2 spike proteins: interactions with aminoglycoside antibiotics.

Scientific reports·2026
Same author

Tuning rotational barriers through substituent modification in catechol-diyl molecular gyrotops.

Organic & biomolecular chemistry·2025
Same author

Persistent Unilateral Pleural Effusion with Chimeric Antigen Receptor T-cell Infiltration in Primary Mediastinal Large B-cell Lymphoma.

Internal medicine (Tokyo, Japan)·2025
Same author

In vivo CRISPR screening reveals cooperation of KMT2D and TP53 deficiencies in B-cell lymphomagenesis.

Blood advances·2025
Same author

Switching Conjugation Is the Predominant Factor Contributing to Complete Reversal of Amide <i>cis</i>-<i>trans</i> (Z-E) Preference through <i>N</i>-Methylation.

The Journal of organic chemistry·2025
Same author

Remnant Stomach Influx Reduces Esophageal Reflux and Malnutrition After Proximal Gastrectomy With Double Tract Reconstruction.

Cancer diagnosis & prognosis·2025

Video Experimental Relacionado

Updated: Jun 13, 2026

Modeling Ligands into Maps Derived from Electron Cryomicroscopy
09:30

Modeling Ligands into Maps Derived from Electron Cryomicroscopy

Published on: July 19, 2024

Los poliedros M24L48 autoensamblados y su agudo cambio estructural sobre la variación sutil del ligando.

Qing-Fu Sun1, Junji Iwasa, Daichi Ogawa

  • 1Department of Applied Chemistry, School of Engineering, The University of Tokyo and Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Corporation (JST), 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

Science (New York, N.Y.)
|May 1, 2010
PubMed
Resumen

Los investigadores crearon esferas gigantes de coordinación M24L48 usando iones y ligandos de paladio. Los cambios sutiles en la geometría del ligando alteraron dramáticamente el resultado del autoensamblaje, demostrando un comportamiento emergente en sistemas complejos a nanoescala.

Más Videos Relacionados

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
12:33

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

Published on: February 4, 2013

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

Videos de Experimentos Relacionados

Last Updated: Jun 13, 2026

Modeling Ligands into Maps Derived from Electron Cryomicroscopy
09:30

Modeling Ligands into Maps Derived from Electron Cryomicroscopy

Published on: July 19, 2024

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles
12:33

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

Published on: February 4, 2013

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

Área de la Ciencia:

  • Química supramolecular de las moléculas.
  • Nanotecnología La nanotecnología es la nanotecnología.
  • Ciencia de los materiales Ciencia de los materiales.

Sus antecedentes:

  • El autoensamblaje es una estrategia de abajo hacia arriba clave para crear estructuras a nanoescala.
  • Los sistemas grandes y multicomponentes son vitales para comprender el ensamblaje biológico, pero son sintéticamente difíciles.
  • La química de la coordinación ofrece vías para diseñar complejas arquitecturas autoensambladas.

Objetivo del estudio:

  • Para sintetizar y caracterizar esferas de coordinación grandes y multicomponentes.
  • Para investigar la sensibilidad del autoensamblaje a la geometría del ligando.
  • Para explorar el comportamiento emergente en sistemas complejos a nanoescala.

Principales métodos:

  • Utilizados iones de paladio (M) y ligandos puentes curvos (L) para autoensamblaje.
  • Sintetizó esferas gigantes de coordinación M24L48.
  • Se analizaron los cambios estructurales resultantes de las variaciones en el ángulo de flexión del ligando.

Principales resultados:

  • Con éxito ensamblado gigantes M24L48 esferas de coordinación de 24 iones de paladio y 48 ligandos.
  • Demostró que ligeros cambios en el ángulo de flexión del ligando alteraron críticamente la estructura final autoensamblada.
  • Se observó un cambio entre las esferas de coordinación M24L48 y M12L24 basado en la geometría del ligando.

Conclusiones:

  • La geometría de los ligandos curvos dicta el resultado del autoensamblaje a gran escala.
  • Se observó un comportamiento emergente, caracterizado por cambios estructurales amplificados de pequeñas variaciones geométricas.
  • Este trabajo destaca el control preciso que se puede lograr en el diseño de estructuras supramoleculares complejas.