The stabilization of gallane and indane by a ring expanded carbene

Area of Science:

• Organometallic Chemistry
• Main Group Chemistry
• Solid-State Chemistry

Background:

• Group 13 binary hydrides like GaH3 and InH3 are reactive species.
• Stabilization of these hydrides is crucial for their study and application.
• The 7Dipp ligand offers steric bulk for potential stabilization.

Purpose of the Study:

• To synthesize and characterize novel complexes of GaH3 and InH3 with the 7Dipp ligand.
• To investigate the thermal stability and structural properties of these new adducts.
• To explore the bonding interactions within the synthesized complexes.

Main Methods:

• Synthesis of group 13 binary hydride adducts.
• Single-crystal X-ray diffraction for structural analysis.
• Thermal analysis (e.g., DSC/TGA) to assess stability.

Main Results:

• Successful preparation of [GaH3(7Dipp)] and [InH3(7Dipp)] complexes.
• Excellent thermal stability observed for both complexes in the solid state.
• Rapid decomposition of the complexes in solution at ambient temperature.
• Identification of short M-H···H-CAlkyl contacts in the solid-state structures.

Conclusions:

• The 7Dipp ligand effectively stabilizes GaH3 and InH3 in the solid state.
• Solution instability limits the practical utility of these specific adducts.
• Short M-H···H-CAlkyl interactions likely play a role in the solid-state structure and stability.