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Supramolecular Structures in [Ag(dppf)] Complexes [dppf = 1,1′‐Bis(diphenylphosphanyl)ferrocene] Stabilized by Coordinatively Versatile Trifluoroacetate (TFA) Ligands
Author(s) -
Lu Xiu Lian,
Leong Weng Kee,
Goh Lai Yoong,
Hor Andy T. S.
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200300684
Subject(s) - chemistry , supramolecular chemistry , ferrocene , denticity , ligand (biochemistry) , hydrogen bond , stereochemistry , crystallography , crystal structure , medicinal chemistry , molecule , organic chemistry , electrochemistry , receptor , biochemistry , electrode
Abstract The interaction of silver( I ) trifluoroacetate and dppf in different molar equivalents has led to the isolation of dinuclear complexes [Ag 2 (μ‐O 2 CCF 3 ) 2 (μ‐dppf)] ( 1 ) and [Ag 2 (η 1 ‐O 2 CCF 3 ) 2 (dppf) 2 ] ( 2 ). Treatment of 1 with excess dppf gave a coordination polymeric compound [Ag(η 2 ‐O 2 CCF 3 )(dppf)] n ( 3 ). Reaction of 1 with PMe 2 Ph in MeOH in the presence of NH 4 PF 6 led to displacement of trifluoroacetate, forming the mononuclear compound [Ag(PMe 2 Ph) 2 (η 2 ‐dppf)]PF 6 ( 4 ). All compounds have been characterized by microanalytical and spectroscopic analyses [IR, MS and NMR ( 1 H, 19 F and 31 P{ 1 H})] as well as X‐ray diffraction studies. Molecular structures of the solvates of 1 , viz. 1A ( 1· 0.5THF) and 1B ( 1· 0.5CH 2 Cl 2 ), 2 and 3 show that they contain trifluoroacetate in bridging, monodentate and bidentate bonding modes, respectively, with dppf as a bridging co‐ligand. Compound 3 is an infinite linear [−dppf−Ag−dppf−Ag−dppf−Ag−] n coordination polymer. Interestingly, 1A and 1B form two different supramolecular network structures through C−H ··· F and C−H ··· O hydrogen‐bonding interactions. Such secondary bonding interactions also lead to the formation of a 3D supramolecular structure in 3 . (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)