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Open-Shell Pd(II) and Ni(II) Complexes Supported by Cyclic(alkyl)(amino)carbene-Derived Carbon Disulfide Radical
Gayeong Lim1,2, Dongmin Kang1,2, Jeongcheol Shin3
1Department of Chemistry, Pusan National University, Busan 46241, Republic of Korea.
Cyclic-(alkyl)-(amino)-carbene derived carbon disulfide adducts act as radical ligands. These ligands stabilize palladium and nickel complexes with multiconfigurational electronic structures, showing potential for catalysis.
Area of Science:
- Organometallic Chemistry
- Ligand Design
- Materials Science
Background:
- Radical ligands significantly influence transition-metal complex properties.
- Cyclic-(alkyl)-(amino)-carbenes (CAACs) are versatile organic building blocks.
Purpose of the Study:
- To investigate CAAC-derived carbon disulfide adducts as radical ligands.
- To explore their ability to stabilize multiconfigurational electronic states in metal complexes.
Main Methods:
- Synthesis of palladium (Pd) and nickel (Ni) complexes.
- Single-crystal X-ray crystallography.
- Computational studies (e.g., DFT calculations).
Main Results:
- A CAAC-derived carbon disulfide adduct successfully functioned as a radical ligand.
- Pd(II) and Ni(II) complexes (1-Pd and 1-Ni) exhibited square planar geometries.
- Both complexes displayed open-shell singlet ground states with accessible triplet and closed-shell singlet states.
Conclusions:
- CAAC-derived radical ligands effectively stabilize multiconfigurational electronic states in metal complexes.
- These findings open new possibilities for applications in catalysis and materials science.
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