Inorganic Chemistry· 2026Q1
Structural Evolution and Bonding Analysis of Heterotrinuclear Carbonyl Clusters TiNi2(CO) n – ( n = 3–5)
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- 2026year
Short summary
Researchers synthesized and characterized TiNi2(CO)n– clusters (n=3-5), revealing a stable trigonal pyramidal Ti–Ni–Ni–C core structure retained in larger clusters, with CO ligands coordinating terminally to Ni atoms.
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Key points
- TiNi2(CO)n– clusters (n=3-5) were synthesized and analyzed using laser sputtering and photoelectron imaging.
- A trigonal pyramidal Ti–Ni–Ni–C core structure is stable and retained in larger clusters.
- Additional CO ligands bind terminally to Ni atoms in clusters with n=4 and 5.
- C–O bond activation increases with CO bridging coordination (μ2, μ3) versus terminal binding.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract A series of heterotrinuclear carbonyl clusters TiNi2(CO)n– (n = 3–5) have been produced by a laser sputtering supersonic cluster ion source and probed by a velocity-map photoelectron imaging spectrometer. Theoretical calculations have been executed to probe the structures and assist the experimental spectral assignments. At n = 3, an intriguing trigonal pyramidal Ti–Ni–Ni–C motif is formed with two μ2-bridging CO ligands and one μ3-bridging CO ligand, which is retained in the most stable structures of larger clusters. For n = 4 and 5, the additional CO ligands are separately bound to each Ni atom in a terminal coordination mode. C–O bond activation is found to increase systematically with the binding motif of metal–CO coordination: terminal < μ2-bridging < μ3-bridging coordination. The present findings elucidate the bonding mechanism in the heteronuclear metal clusters at the molecular level and provide microscopic insights into metal–CO interactions in heterometallic systems.
The authors' abstract, as published at the source. Inorganic Chemistry, 2026 · DOI ↗
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Field: Inorganic Chemistry
Inorganic ChemistryChemistry