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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 10
BKCSDE 30(10)
October 20, 2009 

 
Title
Ring-Conformations via the Competition of Electrostatic Interaction and Argentophilic Interaction. Cyclodimeric Structures of Silver Trifluoromethanesulfonate Containing Isonicotinate Ester Ligands
Author
Chi Won Kim, Cho Rong Kim, Tae Hwan Noh, Ok Sang Jung*
Keywords
Isonicotinoyl ligands, Metallacyclodimers, Ring-conformation, Silver(I) complexes
Abstract
Metallacyclodimers, [Ag(OTf)(L1)]2 and [Ag(L2)]2(OTf)2 (L1 = 1,3-dibromo-2,2-bis[(isonicotinoyloxy)methyl] propane; L2 = 2,5-dimethyl-2,5-bis(isonicotinoyloxy)hexane) were constructed and characterized. The crystal structure of [Ag(OTf)(L1)]2 reveals a 32-membered cyclodimer, whereas that of [Ag(L2)]2(OTf)2 shows a linked 34-membered cyclodimer chain via intercyclic argentophilic (Ag…Ag) interactions. [Ag(OTf)(L1)]2 affords “intramolecular π-π interaction cyclodimer” whereas [Ag(L2)]2(OTf)2 produces a racemic mixture of “twisted cyclodimer”. Ring-conformation of the cyclodimers was affected via the competition of electrostatic interaction and argentophilic interaction.
Page
2341 - 2344
Full Text
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