Abstract
In the title compound, {(C6H16NO)[Cu2(CN)3]} n , the cyanide groups link the Cu(I) atoms into an open three-dimensional anionic network, with the mol-ecular formula Cu2(CN)3 (-). One Cu(I) atom is tetra-hedrally bound to four CN groups, and the other Cu(I) atom is bonded to three CN groups in an approximate trigonal-planar coordination. The tetra-hedrally coordinated Cu(I) atoms are linked into centrosymmetric dimers by the C atoms of two end-on bridging CN groups which bring the Cu(I) atoms into close contact at 2.5171 (7) Å. Two of the cyanide groups bonded to the Cu(I) 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-di-ethyl-ethano-lamine mol-ecules 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 inter-actions between the cations and the anionic network.
Highlights
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) A
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
Summary
This structure determination was undertaken as part of our ongoing study of mixed-valence copper cyanide complexes, with the goal of directed synthesis of new polymeric structures. The intention is to build amine-coordinated CuII atoms into CuI cyanide-bridged networks by having two or more CN groups coordinating to the CuII atoms as well as the amine N atoms. There are two CN groups coordinating in a trans configuration to CuII atoms (the resulting coordination polyhedron is distorted octahedral), with incorporation of CuII into the two-dimensional network. This led us to attempt a similar synthesis involving the substituted ligand diethyl(2-hydroxyethyl)amine, or N,N-diethylethanolamine, et2oen. Symmetry codes: (i) x À 12; Ày þ 12; z þ 12; (ii) x À 1; y; z; (iii) Àx þ 1; Ày; Àz þ 2
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