Bidentate Phosphanyl- and Arsanylboranes.

Area of Science:

• Organometallic Chemistry
• Boron Chemistry
• Ligand Design

Background:

• Development of novel ligands is crucial for advancing coordination chemistry.
• Pnictogenyl-functionalized boron compounds offer unique electronic and steric properties.
• Exploring new synthetic routes to access diverse ligand architectures is an ongoing challenge.

Purpose of the Study:

• To synthesize a new class of neutral bidentate ligands with pnictogenyl-functional sites.
• To investigate the coordination behavior of these ligands with gold(I) and group 13 elements.
• To explore the structural diversity of the resulting metal complexes and inorganic molecules.

Main Methods:

• Reaction of tmeda·(BH2I)2 with various phosphanides to yield phosphanylboranes.
• Extension of the synthetic strategy to arsanylboranes.
• Complexation of ligands with Au(I) salts to form metal complexes.
• Coordination with boron moieties to create group 13/15 chain-like molecules.
• Density Functional Theory (DFT) calculations to understand synthetic pathways.

Main Results:

• Successful synthesis of bidentate phosphanylboranes and the first bidentate arsanylborane.
• Formation of both polymeric and monomeric gold(I) complexes depending on ligand substituents.
• Generation of neutral oligomeric group 13/15 chain-like molecules.
• DFT calculations provided insights into the synthesis of mono- and bidentate pnictogenylboranes.

Conclusions:

• A versatile synthetic strategy for novel bidentate pnictogenylborane ligands has been established.
• These ligands exhibit diverse coordination chemistry, leading to various metal complexes and inorganic structures.
• The study expands the scope of boron-based ligands and their applications in coordination chemistry.