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Stable silver(I) hydride complexes supported by diselenophosphate ligands
C W Liu1, Hao-Wei Chang, Bijay Sarkar
1Department of Chemistry, National Dong Hwa University, Hualien, Taiwan 97401, ROC. chenwei@mail.ndhu.edu.tw
Inorganic Chemistry
|December 23, 2009
Summary
Researchers synthesized the first stable silver(I) cluster cations with hydride bridges, featuring an octanuclear silver core. Spectroscopic and computational studies confirmed the structure and dynamics of these novel silver-hydride clusters.
Area of Science:
- Inorganic Chemistry
- Cluster Chemistry
- Organometallic Chemistry
Background:
- Silver clusters are of interest for catalysis and materials science.
- Understanding metal-hydride bonding is crucial for reactivity studies.
- Previous studies have not reported stable silver clusters with interstitial hydride ligands.
Purpose of the Study:
- To synthesize and characterize novel silver(I) cluster cations containing hydride bridges.
- To elucidate the structural and dynamic properties of these clusters in solution.
- To investigate the energetic favorability of different core geometries.
Main Methods:
- Synthesis of silver(I) cluster cations [Ag(8)(mu(4)-H){Se(2)P(OR)(2)}(6)](+).
- Characterization using Nuclear Magnetic Resonance (NMR) spectroscopy ((1)H and (109)Ag).
- Computational modeling using Density Functional Theory (DFT).
Main Results:
- The first stable T-symmetric silver(I) cluster cations with interstitial hydride ligands were synthesized.
- NMR data indicated dynamic exchange between silver atoms in solution.
- DFT calculations supported the T-symmetric structure over a T(h) symmetric cubic core, deeming the latter energetically unfavorable.
Conclusions:
- Stable silver-hydride clusters with interstitial hydride ligands can be synthesized.
- These clusters exhibit dynamic behavior in solution.
- The T-symmetric structure is the preferred low-energy configuration for the Ag(8)H core.
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