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Related Concept Videos

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...
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 - 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,...
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...
Ionic Crystal Structures02:42

Ionic Crystal Structures

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Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures
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Facet-to-facet Linking of Shape-anisotropic Colloidal Cadmium Chalcogenide Nanostructures

Published on: August 10, 2017

A novel two-dimensional framework based on unprecedented cadmium(II) chains.

Jie Qin1, Jian Ping Ma, Li Li Liu

  • 1College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, People's Republic of China.

Acta Crystallographica. Section C, Crystal Structure Communications
|February 5, 2009
PubMed
Summary
This summary is machine-generated.

Researchers synthesized a novel 2D coordination polymer using a bent ligand and cadmium chloride. This cadmium(II) framework features a unique bridging mode of chloride and water ligands, forming zigzag inorganic chains.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Crystallography

Background:

  • Coordination polymers offer tunable structures and properties.
  • Cadmium-based materials are explored for diverse applications.
  • Ligand design is crucial for constructing novel network architectures.

Purpose of the Study:

  • To synthesize and characterize a novel 2D coordination polymer using 4-[(1H-1,2,4-triazol-1-yl)methyl]benzoic acid (HL) and cadmium chloride.
  • To investigate the structural features and coordination environment of the cadmium(II) ions.
  • To explore the bridging modes of ligands and the resulting network dimensionality.

Main Methods:

  • Hydrothermal synthesis of the coordination polymer.
  • Single-crystal X-ray diffraction for structural determination.
  • Analysis of coordination geometry, bridging ligands, and network topology.

Main Results:

  • A novel 2D coordination polymer, [Cd(C(10)H(8)N(3)O(2))Cl(H(2)O)](n), was successfully synthesized.
  • The cadmium(II) center exhibits a seven-coordinated, pentagonal-bipyramidal geometry.
  • A unique zigzag inorganic chain structure formed by alternating mu(2)-Cl and mu(2)-H(2)O bridges between Cd(II) ions was observed for the first time in a cadmium(II) framework.
  • The 2D network is formed by connecting these chains via the bridging carboxylate ligand.
  • The 2D nets stack to form a 3D framework through interlayer hydrogen bonding.

Conclusions:

  • The study reports the first example of a cadmium(II) framework with alternating mu(2)-Cl and mu(2)-H(2)O bridging ligands.
  • The ligand HL effectively directs the formation of a 2D coordination polymer with a unique structural motif.
  • The findings contribute to the understanding of structure-property relationships in cadmium-based coordination polymers.