Periodic Compounds: Syntheses at High Pressures and Temperatures

Area of Science:

• Inorganic Chemistry
• Materials Science
• Chemical Physics

Background:

• A novel class of compounds, termed
• periodic compounds,
• has been identified.
• These compounds are defined by a specific selection rule: G = Sigmad(i)e(i)/Sigmad(i), where G corresponds to periodic table groups.
• The rule utilizes the number of bonding electrons contributed by an atom (e(i)) and the number of atoms per formula weight (d(i)).

Purpose of the Study:

• To introduce and define the concept of periodic compounds.
• To discuss the classification of periodic compounds into symmetrical and unsymmetrical types.
• To explore the synthetic potential of unsymmetrical periodic compounds.

Main Methods:

• Utilizing a defined selection rule (G = Sigmad(i)e(i)/Sigmad(i)) to classify compounds.
• Analyzing the integral values of G, e(i), and d(i) for compound identification.
• Reviewing recent synthetic advancements, such as the creation of B(2)O.

Main Results:

• Periodic compounds are categorized into symmetrical and unsymmetrical types.
• The compound B(2)O, an isoelectronic analog of carbon, has been successfully synthesized.
• The synthesis of B(2)O demonstrates the feasibility of creating unsymmetrical periodic compounds.

Conclusions:

• The discovery of periodic compounds expands the understanding of chemical bonding and material classification.
• The successful synthesis of unsymmetrical periodic compounds like B(2)O opens new avenues for materials discovery.
• High-pressure and high-temperature techniques are promising for the synthesis of novel unsymmetrical periodic compounds.