Accessing Homo- and Heterobimetallic Complexes with a Dianionic Pentadentate Ligand

Area of Science:

• Coordination Chemistry
• Main-Group Chemistry
• Organometallic Chemistry

Background:

• The tetrapyrazolylpyridyl diborate (B2Pz4Py) ligand is a versatile platform for stabilizing unusual metal complexes.
• Exploring new main-group element compounds and their reactivity is crucial for advancing chemical synthesis.

Purpose of the Study:

• To synthesize and characterize novel heterobimetallic main-group element complexes using the B2Pz4Py ligand.
• To investigate the reactivity of these complexes with copper sources, leading to new copper cluster compounds.

Main Methods:

• Synthesis of heterobimetallic tin(II)-lithium(I) and tin(II)-thallium(I) complexes.
• Characterization using single-crystal X-ray diffraction.
• Reaction of tin-thallium complex with copper(I) sources followed by oxidation.

Main Results:

• Successful isolation and full characterization of heterobimetallic tin(II)-lithium(I) (1) and tin(II)-thallium(I) (2) complexes.
• Complex 2 was used to synthesize a homotetrametallic copper(I) complex (4).
• Oxidation of complex 4 yielded a bimetallic copper(II) complex (5) with a bridging bromido ligand.

Conclusions:

• The B2Pz4Py ligand is effective for isolating heterobimetallic main-group element compounds.
• The synthesized complexes serve as precursors for novel copper cluster compounds.
• This work expands the scope of coordination chemistry involving main-group elements and transition metals.