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Related Concept Videos

Cycloalkanes02:28

Cycloalkanes

15.2K
Cycloalkanes are saturated cyclic hydrocarbons with carbon atoms arranged in the form of rings. They have two fewer hydrogen atoms than the corresponding acyclic alkane; therefore, their general formula is CnH2n. The structural formulas of cycloalkanes are simplified using the line-angle representation. The regular polygons are used to represent the cycloalkane rings, with each side representing a carbon-carbon bond.
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...
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Metallic Solids02:37

Metallic Solids

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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....
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Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

3.6K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
3.6K
Ionic Crystal Structures02:42

Ionic Crystal Structures

16.7K
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...
16.7K
Chair Conformation of Cyclohexane02:02

Chair Conformation of Cyclohexane

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The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
17.7K
Structures of Carboxylic Acid Derivatives01:28

Structures of Carboxylic Acid Derivatives

3.6K
Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the unhybridized p...
3.6K

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Cs2Cd(C2H)2(C2): A Crystalline Acetylide with Bridging C2 Units.

Melanie Werker1, Uwe Ruschewitz1

  • 1Department of Chemistry , University of Cologne , Greinstraße 6 , D-50939 Cologne , Germany.

Inorganic Chemistry
|November 13, 2019
PubMed
Summary

A new cesium cadmium acetylide compound, Cs2Cd(C2H)2(C2), was synthesized. This material features a polymeric chain anion structure formed via a condensation reaction from Cs2Cd(C2H)4.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Solid-State Chemistry

Background:

  • The synthesis and structural characterization of novel metal acetylides are crucial for understanding coordination chemistry and developing new materials.
  • Cesium cadmium compounds with acetylide ligands offer potential for unique structural motifs and properties.

Purpose of the Study:

  • To synthesize and characterize a new cesium cadmium acetylide compound, Cs2Cd(C2H)2(C2).
  • To elucidate the crystal structure and bonding of the synthesized material.
  • To investigate the reaction mechanism leading to its formation.

Main Methods:

  • Synthesis of Cs2Cd(C2H)2(C2) via thermal treatment of Cs2Cd(C2H)4 under argon or ammonothermal conditions.
  • Crystal structure determination using synchrotron powder diffraction data (space group *Cmcm*).
  • Characterization using Differential Scanning Calorimetry/Thermogravimetric Analysis (DSC/TGA) and Infrared (IR) spectroscopy.

Main Results:

  • The crystal structure reveals Cd2+ cations tetrahedrally coordinated by four acetylide groups: two terminal C2H- and two bridging C22-.
  • A polymeric ∞1[Cd(C2H)2(C2)2/22-] chain-like anion structure was identified, with Cs+ cations separating the chains.
  • Evidence suggests formation via a condensation reaction of Cs2Cd(C2H)4 with the release of acetylene (C2H2).

Conclusions:

  • Cs2Cd(C2H)2(C2) represents a novel cesium cadmium acetylide with a unique polymeric chain structure.
  • The synthesis and structural data provide insights into condensation reactions involving metal acetylides.
  • The findings contribute to the understanding of inorganic coordination polymers and solid-state chemistry.