A triphenylboroxin derivative possessing two intramolecular chelates

Area of Science:

• Organoboron Chemistry
• Supramolecular Chemistry
• Organic Synthesis

Background:

• Triphenylboroxin derivatives are known for their unique structural and electronic properties.
• Boron-nitrogen interactions play a crucial role in the assembly and function of supramolecular structures.
• Understanding the impact of chelation on boroxin ring conformation is essential for designing novel boron-containing compounds.

Purpose of the Study:

• To synthesize and characterize a novel triphenylboroxin derivative with potential B-chelating interactions.
• To investigate the structural consequences of double boron chelation in a cyclic trimer system.
• To explore the formation of a tridehydro cyclic trimer from benzaldehyde hydrazone precursors.

Main Methods:

• Condensation reaction between 2-formylbenzeneboronic acid and 1,1-dimethylhydrazine.
• Characterization of the synthesized compound using spectroscopic and crystallographic techniques.
• Analysis of the molecular structure to identify B-chelating interactions and conformational effects.

Main Results:

• Successful synthesis of bis(8-B-4)-1,3,5-tris[2-[(N,N-dimethylhydrazono)methyl]-phenyl)]boroxin (C27H33B3N6O3).
• The compound is a tridehydro cyclic trimer of benzaldehyde hydrazone.
• The first triphenylboroxin derivative exhibiting two B-chelating interactions was identified, inducing molecular asymmetry and slight puckering of the boroxin ring.

Conclusions:

• The study reports the synthesis of a novel, structurally unique triphenylboroxin derivative.
• The presence of double B-chelating interactions significantly influences the molecular geometry.
• This work expands the understanding of boron's coordination chemistry in complex organic frameworks.