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

Abstract

In the title compound, {(C6H16NO)[Cu2(CN)3]}n, the cyanide groups link the CuIatoms into an open three-dimensional anionic network, with the molecular formula Cu2(CN)3−. One CuIatom is tetrahedrally bound to four CN groups, and the other CuIatom is bonded to three CN groups in an approximate trigonal-planar coordination. The tetrahedrally coordinated CuIatoms are linked into centrosymmetric dimers by the C atoms of two end-on bridging CN groups which bring the CuIatoms into close contact at 2.5171 (7) Å. Two of the cyanide groups bonded to the CuIatoms with trigonal-planar surrounding link the dimeric units into columns along theaaxis, and the third links the columns together to form the network. TheN,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.