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Shorter argentophilic interaction than aurophilic interaction in a pair of dimeric {(nhc)mcl}(2) (m= ag, au) complexes supported over a n/o-functionalized n-heterocyclic carbene (nhc) ligand

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Title Shorter argentophilic interaction than aurophilic interaction in a pair of dimeric {(nhc)mcl}(2) (m= ag, au) complexes supported over a n/o-functionalized n-heterocyclic carbene (nhc) ligand
 
Creator RAY, L
SHAIKH, MM
GHOSH, P
 
Subject ring-opening polymerization
closed-shell interactions
ab-initio pseudopotentials
metal-metal interactions
center-dot-pt
gold(i) complexes
structural-characterization
helium dimer
gold(i)-gold(i) interactions
intermolecular interactions
 
Description Synthesis, structure, bonding, and photoluminescence studies of a pair of neutral dimeric silver and gold complexes of a N/O-functionalized N-heterocyclic carbene ligand exhibiting closed-shell d(10)center dot center dot center dot d(10) argentophilic and aurophilic interactions, are reported. In particular, dimeric complexes of the type {[1-(benzyl)-3-(N-tert-butylacetamido)imidazol-2-ylidene]MCl}(2) [M = Ag (2); Au (3)] displayed attractive metallophilic interaction in the form of a close ligand-unsupported metal center dot center dot center dot metal contact [3.1970(12) angstrom in 2; 3.2042(2) angstrom in 3] as observed from X-ray diffraction study and also was further verified by low temperature photoluminescence study at 77 K that showed the characteristic emission (527 nm for 2; 529 nm for 3] owing to the metal... metal interaction. The nature of the metallophilic interaction in these complexes was further probed using computational studies that estimated the metal... metal interaction energy to be 12.8 (2) and 8.6 kcal/mol (3). Notably, the argentophilic interaction was found to be stronger than the aurophilic interaction in this series of neutral dimeric complexes. The complexes 2 and 3 were synthesized sequentially, with the silver 2 complex prepared by the reaction of the 1-(benzyl)-3-(N-tert-butylacetamido)imidazolium chloride with Ag2O in 66% yield, while the gold 3 complex was obtained by the transmetallation reaction of the silver 2 complex with (SMe2)AuCl in 86% yield.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-10-15T06:34:24Z
2011-12-15T09:16:21Z
2011-10-15T06:34:24Z
2011-12-15T09:16:21Z
2008
 
Type Review
 
Identifier INORGANIC CHEMISTRY,47(1)230-240
0020-1669
http://dx.doi.org/10.1021/ic701830m
http://dspace.library.iitb.ac.in/xmlui/handle/10054/13938
http://hdl.handle.net/100/3125
 
Language en