Abstract
For the first time, the easily accessible azulene‑1‑carboxylate anion has been employed as building block for the construction of crystalline coordination polymers. Neutralization of azulene‑1‑carboxylic acid (3) with NaOH in aqueous solution provided the dark purple sodium salt C10H7CO2Na·H2O (4) in 85% isolated yield. Single-crystal X-ray diffraction of 4 revealed a supramolecular layer structure in the crystalline state. Subsequent treatment of 4 with 1 equiv. of Me3SnCl afforded a rare organotin derivative of azulene, namely polymeric [C10H7CO2SnMe3]n (5) as purple crystals (82% yield).
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