Cationic Chains of Parent Arsanylboranes and Substituted Phosphanylboranes

Area of Science:

• Organometallic Chemistry
• Boron Chemistry
• Phosphorus Chemistry

Background:

• Monomeric phosphanylboranes are valuable precursors in synthetic chemistry.
• The development of new synthetic routes for cationic chain compounds is of significant interest.

Purpose of the Study:

• To synthesize and characterize novel cationic phosphanylborane and arsanylborane chain compounds.
• To explore the synthetic utility of substituted monomeric phosphanylboranes and arsanylboranes.

Main Methods:

• Synthesis of cationic chain compounds from substituted monomeric phosphanylboranes and arsanylboranes.
• Characterization using X-ray structure analysis, NMR, IR spectroscopy, and mass spectrometry.
• Computational analysis using DFT calculations.

Main Results:

• Successfully synthesized stable cationic phosphanylborane cations [Me3N⋅H2B-PR1R2-BH2⋅NMe3]+ and [Me3N⋅H2B-PR1R2-BH2-PR1R2-BH2⋅NMe3]+.
• Synthesized the longest known arsanylborane chain, [Me3N⋅H2B-AsH2-BH2-AsH2-BH2⋅NMe3]+.
• Observed a formal hydroarsination reaction of the arsanylborane chain with acetonitrile.

Conclusions:

• The reported synthetic strategy is effective for creating small, cationic oligomeric units.
• The synthesized compounds exhibit high stability and unique structural features.
• This work expands the scope of boron and phosphorus-containing chain compounds.