A new polymorph of succinylcholinium diiodide: comparison of succinylcholinium structures

The title compound {systematic name: trimethyl[2-({4-oxo-4-[2-(trimethylazaniumyl)ethoxy]butanoyl}oxy)ethyl]azanium diiodide}, C₁₄H₃₀N₂O₄²⁺·2I⁻, is a salt of the succinylcholinium cation. There is one formula unit in the asymmetric unit, represented by two anions and two halves of two cations which lie on centres of inversion. The component species are stabilized by electrostatic interactions, and C—H...I and C—H...O hydrogen bonds are also present.