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Related Concept Videos

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...
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...
Structural Isomerism02:34

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
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...
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...
Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...

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Correction: Dodecanuclear [NiII8Ln<sub>4</sub>] clusters and rings of corner-sharing {NiII2Ln<sub>2</sub>} cubanes (Ln = Dy, Gd, Y); magnetic and magnetothermal properties.

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The Synthesis of [Sn10(Si(SiMe3)3)4]2- Using a Metastable Sn(I) Halide Solution Synthesized via a Co-condensation Technique
12:43

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Calix[4]arene-supported Fe(III)2Ln(III)2 clusters.

Sergio Sanz1, Kerry Ferreira, Ruaraidh D McIntosh

  • 1EaStCHEM School of Chemistry, University of Edinburgh, West Mains Road, Edinburgh, EH9 3JJ, Scotland.

Chemical Communications (Cambridge, England)
|July 19, 2011
PubMed
Summary
This summary is machine-generated.

New iron-lanthanide (Fe-Ln) clusters were synthesized easily. These 3d-4f systems are structurally similar to calixarene solvates, offering a new entry point for research.

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Area of Science:

  • Inorganic Chemistry
  • Coordination Chemistry
  • Materials Science

Background:

  • Lanthanide (Ln) and transition metal (Fe) clusters are of interest for their magnetic and optical properties.
  • Developing synthetic routes to novel 3d-4f heterometallic clusters remains a challenge.

Purpose of the Study:

  • To synthesize and characterize a new series of Fe(III)(2)Ln(III)(2) clusters.
  • To investigate the structural features and potential of these clusters as building blocks for advanced materials.

Main Methods:

  • Facile bench-top synthesis of Fe(III)(2)Ln(III)(2) clusters.
  • Single-crystal X-ray diffraction for structural determination.
  • Analysis of packing arrangements and comparison with known structures.

Main Results:

  • Successful synthesis of several Fe(III)(2)Ln(III)(2) clusters under mild conditions.
  • The clusters exhibit a unique packing motif analogous to calixarene solvates.
  • These findings establish a new class of 3d-4f coordination compounds.

Conclusions:

  • The facile synthesis provides an accessible entry point to Fe-Ln 3d-4f systems.
  • The observed packing structure suggests potential for controlled self-assembly and material design.
  • This work opens avenues for exploring the properties of this new class of heterometallic clusters.