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Related Concept Videos

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...
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...
Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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,...
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...
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...

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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Published on: April 14, 2020

Lanthaballs: chiral, structurally layered polycarbonate tridecanuclear lanthanoid clusters.

Anthony S R Chesman1, David R Turner, Boujemaa Moubaraki

  • 1School of Chemistry, Monash University, VIC 3800, Australia.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 11, 2009
PubMed
Summary

Researchers synthesized novel spherical lanthanoid complexes called 'lanthaballs'. These structures utilize carbonate as the primary anion, showcasing unique chirality and pi-stacked ligand configurations for potential applications in cluster formation.

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Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

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Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
06:35

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

Published on: February 15, 2016

Area of Science:

  • Coordination Chemistry
  • Inorganic Chemistry
  • Materials Science

Background:

  • Lanthanoid complexes are crucial in various scientific fields.
  • Exploring new cluster formations with novel anionic components is an active research area.
  • Understanding the structural and magnetic properties of these complexes is essential for their applications.

Purpose of the Study:

  • To demonstrate the viability of using carbonate as the primary anion in lanthanoid cluster formation.
  • To synthesize and characterize novel spherical tridecanuclear lanthanoid complexes, termed 'lanthaballs'.
  • To investigate the structural, magnetic, and chiral properties of these newly synthesized complexes.

Main Methods:

  • Synthesis of tridecanuclear lanthanoid complexes with a [Ln(13)(CO(3))(14)] core.
  • Characterization using techniques to determine structural and magnetic properties.
  • Analysis of the chirality through the configuration of pi-stacked phenanthroline ligands.

Main Results:

  • Successful synthesis of 'lanthaballs,' spherical lanthanoid complexes featuring a novel [Ln(CO(3))(6)] moiety.
  • Demonstration of carbonate's role as a primary anion in forming these unique clusters.
  • Evidence of chirality in lanthaballs due to the arrangement of extended columns of pi-stacked phenanthroline ligands.

Conclusions:

  • Carbonate is a viable primary anion for creating novel lanthanoid cluster architectures.
  • 'Lanthaballs' represent a new class of chiral lanthanoid complexes with potential for further research.
  • The study provides insights into the structural and magnetic behavior of these unique cluster compounds.