Poly[μ5-{hydrogen bis-[(E)-cinnamato]}-caesium].

Area of Science:

• Coordination Chemistry
• Materials Science
• Crystallography

Background:

• Coordination polymers offer tunable properties for diverse applications.
• Caesium (Cs) coordination complexes are less explored compared to other alkali metals.
• Trans-cinnamic acid is a versatile organic ligand with potential for metal complexation.

Purpose of the Study:

• To synthesize and characterize a novel caesium coordination polymer using trans-cinnamic acid.
• To elucidate the crystal structure and bonding characteristics of the resulting complex.
• To investigate the formation of a two-dimensional coordination polymer.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the crystal structure.
• The crystal structure was solved and refined, accounting for non-merohedric twinning.
• Coordination environments and hydrogen bonding interactions were analyzed.

Main Results:

• A 2D coordination polymer, [Cs(C9H7O2)(C9H8O2)]n, was successfully synthesized.
• Caesium ions exhibit irregular CsO8 coordination polyhedra linked by bridging carboxylate groups.
• Inter-ligand hydrogen bonding and a delocalized hydrogen atom were observed, contributing to structural stability.
• The crystal structure was determined from a non-merohedrically twinned crystal (approx. 1:1 ratio).

Conclusions:

• The study successfully synthesized and characterized a novel 2D caesium coordination polymer.
• The structure highlights the role of bridging carboxylates and hydrogen bonding in forming extended networks.
• The findings contribute to understanding the coordination chemistry of caesium with organic ligands.