Hexacoordinated nitrogen(V) stabilized by high pressure.

Area of Science:

• Inorganic Chemistry
• Theoretical Chemistry
• Materials Science

Background:

• Nitrogen typically adheres to the octet rule, with electron counts of eight in its valence shell.
• Despite extensive research, hypervalent nitrogen compounds, featuring higher electron counts, have not been synthesized.
• Nitrogen exhibits diverse oxidation states, ranging from +5 to -3.

Purpose of the Study:

• To present theoretical evidence for the synthesis of hypervalent nitrogen compounds.
• To explore the possibility of creating a hexacoordinated nitrogen(V) species.
• To identify potential synthetic routes for novel nitrogen-containing materials.

Main Methods:

• Computational chemistry methods were employed to investigate potential nitrogen hypervalency.
• Theoretical calculations were performed to assess the stability of proposed nitrogen compounds.
• High-pressure synthesis conditions were simulated to determine feasibility.

Main Results:

• Theoretical evidence suggests the feasibility of synthesizing a salt containing hexacoordinated nitrogen(V) (NF6-).
• This synthesis could be achieved at a pressure of 40 GPa through the oxidation of NF3 by F2.
• The proposed compound satisfies the criteria for hypervalent nitrogen.

Conclusions:

• The synthesis of hypervalent nitrogen compounds is attainable with current high-pressure experimental techniques.
• This research opens avenues for a new class of nitrogen-containing materials.
• The findings challenge the long-standing limitations of nitrogen's electron configuration.