Bis(1-ethyl-3-methyl­imidazolium) 36-diselanyl­idene-1245-tetra­selena-36-diphospha­cyclo­hexane-36-di­selen­olate

摘要

In the title compound, 2C6H11N2 ⁺·P2Se8 ²⁻ or [EMIM]2P2Se8 (EMIM = 1-ethyl-3-methyl­imidazolium), the anions, located about inversion centers between EMIM cations, exhibit a cyclo­hexane-like chair conformation. The cations are found in columns along the a axis, with centroid–centroid distances of 3.8399 (3) and 4.7530 (2) Å. The observed P—Se distances and Se—P—Se angles agree with other salts of this anion.