Heavier bis(m-terphenyl)element phosphaethynolates of group 13.

Area of Science:

• Organometallic Chemistry
• Main Group Chemistry
• Inorganic Synthesis

Background:

• Heavier group 13 elements (Ga, In) offer unique electronic properties for complex synthesis.
• Phosphaketene ligands are versatile building blocks in coordination chemistry.
• Understanding the reactivity of E-P bonds is crucial for novel compound development.

Purpose of the Study:

• To synthesize and characterize novel heavier group 13 phosphaketene complexes.
• To investigate the reactivity of these complexes with carbenes and elemental tellurium.
• To elucidate the electronic structure and bonding characteristics of the resulting compounds.

Main Methods:

• Synthesis of phosphaketene complexes of Gallium (Ga) and Indium (In).
• Reactions with 1,2,3,4-tetramethylimidazolin-2-ylidene (IMe4) and elemental tellurium (Te).
• Characterization using X-ray crystallography, heteronuclear NMR spectroscopy, and DFT calculations.

Main Results:

• Formation of heavier group 13 phosphaketene complexes (2,6-Mes2C6H3)2EPCO.
• Synthesis of novel Ga and In complexes featuring a P(O)C(IMe4) moiety.
• Generation of five-membered ETePCO-heterocycles via tellurium insertion into the E-P bond.

Conclusions:

• Successful synthesis and characterization of new Ga and In phosphaketene derivatives.
• Demonstrated reactivity leading to the formation of unique heterocyclic structures.
• Detailed electronic structure analysis provides insights into bonding within the PCO fragment and heterocycles.