Crystal structure of poly[N,N-di­ethyl-2-hy­dr­oxy­ethan-1-aminium [μ3-cyanido-κ3C:C:N-di-μ-cyanido-κ4C:N-dicuprate(I)]

In the title compound, {(C6H16NO)[Cu2(CN)3]}n, the cyanide groups link the CuI atoms into an open three-dimensional anionic network, with the mol­ecular formula Cu2(CN)3−. One CuI atom is tetra­hedrally bound to four CN groups, and the other CuI atom is bonded to three CN groups in an approximate trigonal-planar coordination. The tetra­hedrally coordinated CuI atoms are linked into centrosymmetric dimers by the C atoms of two end-on bridging CN groups which bring the CuI atoms into close contact at 2.5171 (7) Å. Two of the cyanide groups bonded to the CuI atoms with trigonal-planar surrounding link the dimeric units into columns along the a axis, and the third links the columns together to form the network. The N,N-di­ethyl­ethano­lamine mol­ecules used in the synthesis have become protonated at the N atoms and are situated in cavities in the network, providing charge neutrality, with no covalent inter­actions between the cations and the anionic network.