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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
catena-Poly[silver(I)-μ-pyrazolato-κN:N']
Chao-Yan Zhang1, Jian-Bo Feng, Qian Gao
1College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100022, People's Republic of China.
Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
Summary
This study reveals the helical chain structure of silver(I) pyrazolate, [Ag(C(3)H(3)N(2))](n). These chains form 2D layers through silver-silver interactions, confirmed by X-ray diffraction.
Area of Science:
- Coordination Chemistry
- Crystal Engineering
- Materials Science
Background:
- Silver(I) complexes exhibit diverse coordination geometries.
- Pyrazolate ligands are versatile bridging ligands in coordination polymers.
- Understanding supramolecular assembly in silver(I) systems is crucial for materials design.
Purpose of the Study:
- To elucidate the crystal structure of the silver(I) pyrazolate compound, [Ag(C(3)H(3)N(2))](n).
- To investigate the nature of silver-silver interactions and their role in forming extended structures.
- To compare single-crystal diffraction data with previous powder diffraction studies.
Main Methods:
- X-ray single-crystal diffraction analysis.
- Analysis of coordination geometry and interatomic distances.
- Comparison with ab initio X-ray powder diffraction data.
Main Results:
- The compound forms infinite helical chains with bridging pyrazolate ligands.
- Intra-chain Ag⋯Ag separation is 3.3718(7) Å, with linear Ag(I) coordination (169.98(14)°).
- Chains assemble into 2D layers via inter-chain Ag⋯Ag interactions (3.2547(6) Å).
Conclusions:
- The crystal structure confirms a unique helical chain motif in silver(I) pyrazolate.
- Silver-silver interactions play a significant role in the 2D layer formation.
- The findings are consistent with prior powder diffraction data, validating the structural model.
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