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Cationic Gold(I) Diarylallenylidene Complexes: Bonding Features and Ligand Effects
Diego Sorbelli1, Laura Nunes Dos Santos Comprido2,3, Gerald Knizia4
1Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, 06123, Perugia, Italy.
Summary
Computational analysis reveals weak, tunable pi-backbonding in gold(I) diarylallenylidene complexes. Bonding trends correlate with aryl substitution, matching experimental data and predicting complex properties.
Area of Science:
- Organometallic Chemistry
- Computational Chemistry
- Materials Science
Background:
- Gold(I) complexes are valuable in catalysis and materials.
- Understanding bonding in gold(I) diarylallenylidene complexes is crucial for predicting their properties.
Purpose of the Study:
- To computationally investigate the bonding characteristics of gold(I) diarylallenylidene complexes.
- To correlate computational findings with experimental data and predict complex behavior.
Main Methods:
- Density Functional Theory (DFT) calculations were employed.
- Qualitative and quantitative bonding analyses were performed.
- Computational results were compared with experimental data (IR, NMR, decomposition rates).
Main Results:
- Gold(I) exhibits weak pi-backbonding in these complexes.
- Pi-backbonding is identified as a tunable electronic feature.
- Computational trends align well with experimental observations.
Conclusions:
- The study provides a detailed understanding of bonding in gold(I) diarylallenylidene complexes.
- Computational models accurately predict spectroscopic features, reactivity, and stability.
- This work facilitates the rational design of novel gold complexes.
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