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Related Concept Videos

Coordination Number and Geometry02:57

Coordination Number and Geometry

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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.
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Valence Bond Theory02:42

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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...
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Structural Isomerism02:34

Structural Isomerism

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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...
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Newman Projections02:06

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Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
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Anionic Chain-Growth Polymerization: Overview01:20

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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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Ziegler–Natta Chain-Growth Polymerization: Overview01:17

Ziegler–Natta Chain-Growth Polymerization: Overview

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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
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A Three-Dimensional Coordination Polymer with an Expanded NbO Structure.

Tianyan Niu1, Xiqu Wang1, Allan J Jacobson1

  • 1Department of Chemistry, University of Houston, Houston, TX 77204-5641 (USA), Fax: (+1) 713-743-2787.

Angewandte Chemie (International Ed. in English)
|June 29, 2021
PubMed
Summary
This summary is machine-generated.

Researchers synthesized a novel 3D coordination polymer, (Ph3Sn)2Ni(CN)4, featuring an expanded NbO structure. This framework contains a large central cavity, offering potential for guest molecule inclusion.

Keywords:
Coordination polymersNickelSolid‐state structuresTin

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Crystallography

Background:

  • Coordination polymers are advanced materials with diverse applications.
  • The synthesis of novel network structures is crucial for materials discovery.
  • Square-planar nickel(II) cyanide complexes offer versatile building blocks.

Purpose of the Study:

  • To synthesize and characterize a novel three-dimensional coordination polymer.
  • To investigate the structural properties of the resulting framework.
  • To explore the potential of the framework for hosting guest molecules.

Main Methods:

  • Single-crystal X-ray diffraction was used to determine the crystal structure.
  • The coordination polymer was synthesized through the reaction of [Ni(CN)4]2- and Ph3Sn+ ions.
  • Structural analysis involved identifying the coordination environment and network topology.

Main Results:

  • A noninterpenetrated three-dimensional coordination polymer with an expanded NbO structure was successfully synthesized.
  • The framework, (Ph3Sn)2Ni(CN)4, possesses a large central cavity.
  • The cavity was found to be occupied by triphenyltin hydroxide, acetonitrile, and water molecules.

Conclusions:

  • The study reports the successful synthesis and structural elucidation of a novel coordination polymer.
  • The expanded NbO topology and the presence of a large cavity highlight the potential of this material for host-guest chemistry.
  • The findings contribute to the understanding of structure-property relationships in coordination polymers.