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Related Concept Videos

Oxymercuration-Reduction of Alkenes02:36

Oxymercuration-Reduction of Alkenes

Oxymercuration–reduction of alkenes is one of the major reactions converting alkenes to alcohols. It involves the hydration of alkenes with mercuric acetate in a mixture of tetrahydrofuran and water, forming an organomercury adduct. This is followed by a demercuration step in which the adduct is reduced to an alcohol using sodium borohydride.
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Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
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Polydentate ligands are most widely used in complexometric titrations because they form more stable complexes with the metal ions than mono- or bidentate ligands due to the chelate effect. Examples of polydentate ligands are ethylenediaminetetraacetic acid (EDTA), crown ethers, and cryptands. The most important feature of optimal polydentate ligands is the ability to form 1:1 complexes in a single-step process. Amino carboxylic acid derivatives are frequently used as complexing agents. EDTA is...
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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.
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Poly[(μ-3,5-dinitro-benzoato)(μ-3,5-dinitro-benzoic acid)rubidium].

Yanqing Miao1, Tao Fan

  • 1Xi'an Medical University, Department of Pharmacy, Hanguang Road No.137, Xi'an 710021, Shaanxi, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
|November 18, 2011
PubMed
Summary

This study details a new 2D framework composed of rubidium cations and 3,5-dinitrobenzoic acid ligands. The framework exhibits unique coordination and hydrogen bonding, forming a novel crystal structure.

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Area of Science:

  • Inorganic Chemistry
  • Crystallography
  • Materials Science

Background:

  • Metal-organic frameworks (MOFs) are advanced materials with tunable properties.
  • Rubidium (Rb) based compounds are less explored in MOF research.
  • 3,5-dinitrobenzoic acid is a versatile organic linker for coordination chemistry.

Purpose of the Study:

  • To synthesize and characterize a novel 2D coordination framework involving rubidium.
  • To investigate the coordination behavior of rubidium with 3,5-dinitrobenzoic acid.
  • To explore the structural features, including hydrogen bonding and framework dimensionality.

Main Methods:

  • Single-crystal X-ray diffraction was used to determine the crystal structure.
  • The asymmetric unit was analyzed to understand the coordination environment of Rb(+).
  • Intermolecular interactions, such as hydrogen bonds, were identified.

Main Results:

  • A novel 2D coordination polymer, [Rb(C(7)H(3)N(2)O(6))(C(7)H(4)N(2)O(6))](n), was successfully synthesized.
  • The rubidium cation is nine-coordinated by oxygen atoms from both benzoate anions and benzoic acid ligands.
  • The framework is constructed through bridging carboxylate groups and nitro group linkages, forming a 2D network along the [110] direction.
  • A short O-H⋯O hydrogen bond was observed between adjacent carboxylate/carboxy groups.

Conclusions:

  • The study presents a new 2D Rb-based coordination framework with 3,5-dinitrobenzoic acid.
  • The coordination polymer exhibits a unique nine-coordinate rubidium environment and specific hydrogen bonding.
  • The findings contribute to the understanding of rubidium coordination chemistry and the design of novel framework materials.