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Synthesis and properties of crown ether isocyanide silver(I) derivatives: X-ray structure of a self-assembled 22-membered diargentacycle by Javier Arias; Manuel Bardají; Pablo Espinet is a Chemistry article available to read on EtoBox.

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The crown ether isocyanide CNR (R = benzo-15-crown-5) reacts with silver(I) salts in the appropriate molar ratio to give [Ag(CNR) n ]X (n = 1, 2; X = CF 3 SO 3 , BF 4 ). X-ray diffraction studies of [Ag(CF 3 SO 3 )(CNR)] show the molecules associated in a dinuclear manner with an antiparallel orientation. The silver centers are tetracoordinated to the isocyanide and to three oxygens, one from the triflate anion and two from the second crown ether in the dimer. The molecular structure displays five cycles: the two 15-crown ether rings, two five-membered argentacycles and a 22-membered diargentacycle. The crown ether in these complexes is able to detect alkaline cations from M(CF 3 SO 3 ) (M = Li, Na, K) by NMR in d 6 -acetone solutions, and to distinguish Li + -Na + from K + .

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Author

Javier Arias; Manuel Bardají; Pablo Espinet

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0020-1693)

Published

2011

Language

EN

Field

Chemistry (Physical Sciences)