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Synthesis, decomposition studies and crystal structure of a three‐dimensional CuCN network structure with protonated N‐methylethanolamine as the guest cation

Synthesis, decomposition studies and crystal structure of a three‐dimensional CuCN network... The compound poly[2‐hydroxy‐N‐methylethan‐1‐aminium [μ3‐cyanido‐κ3C:C:N‐di‐μ‐cyanido‐κ4C:N‐dicuprate(I)]], {(C3H10NO)[Cu2(CN)3]}n or [meoenH]Cu2(CN)3, crystallizes in the tetragonal space group P43. The structure consists of a three‐dimensional (3D) anionic CuICN network with noncoordinated protonated N‐methylethanolamine cations providing charge neutrality. Pairs of cuprophilic Cu atoms are bridged by the C atoms of μ3‐cyanide ligands, which link these units into a 43 spiral along the c axis. The spirals are linked together into a 3D anionic network by the two other cyanide groups. The cationic moieties are linked into their own 43 spiral via N—H…O and O—H…O hydrogen bonds, and the cations interact with the 3D network via an unusual pair of N—H…N hydrogen bonds to one of the μ2‐cyanide groups. Thermogravimetric analysis indicates an initial loss of the base cation and one cyanide as HCN at temperatures in the range 130–250 °C to form CuCN. We show how loss of a specific cyanide group from the 3D CuCN structure could form the linear CuCN structure. Further heating leaves a residue of elemental copper, isolated as the oxide. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acta Crystallographica Section C: Structural Chemistry Wiley

Synthesis, decomposition studies and crystal structure of a three‐dimensional CuCN network structure with protonated N‐methylethanolamine as the guest cation

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References (35)

Publisher
Wiley
Copyright
Copyright © 2020 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0108-2701
eISSN
2053-2296
DOI
10.1107/S2053229620004477
Publisher site
See Article on Publisher Site

Abstract

The compound poly[2‐hydroxy‐N‐methylethan‐1‐aminium [μ3‐cyanido‐κ3C:C:N‐di‐μ‐cyanido‐κ4C:N‐dicuprate(I)]], {(C3H10NO)[Cu2(CN)3]}n or [meoenH]Cu2(CN)3, crystallizes in the tetragonal space group P43. The structure consists of a three‐dimensional (3D) anionic CuICN network with noncoordinated protonated N‐methylethanolamine cations providing charge neutrality. Pairs of cuprophilic Cu atoms are bridged by the C atoms of μ3‐cyanide ligands, which link these units into a 43 spiral along the c axis. The spirals are linked together into a 3D anionic network by the two other cyanide groups. The cationic moieties are linked into their own 43 spiral via N—H…O and O—H…O hydrogen bonds, and the cations interact with the 3D network via an unusual pair of N—H…N hydrogen bonds to one of the μ2‐cyanide groups. Thermogravimetric analysis indicates an initial loss of the base cation and one cyanide as HCN at temperatures in the range 130–250 °C to form CuCN. We show how loss of a specific cyanide group from the 3D CuCN structure could form the linear CuCN structure. Further heating leaves a residue of elemental copper, isolated as the oxide.

Journal

Acta Crystallographica Section C: Structural ChemistryWiley

Published: Jan 1, 2020

Keywords: ; ; ; ; ; ; ;

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