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Na(2)AgF(4): 1D antiferromagnet with unusually short Ag(2+)Ag(2+) separation.
MedLine Citation:
PMID:  23187895     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Disodium tetrafluoroargentate(ii) (Na(2)AgF(4)) has been synthesized by the thermal decomposition of NaAg(iii)F(4) in the presence of NaF. This novel synthetic pathway yielded a high-purity product which enabled determination of the crystal structure and magnetic properties of this compound. The crystal structure of Na(2)AgF(4) contains infinite [AgF(2+4/2)](2-) chains, in analogy to β-K(2)AgF(4), but with a different packing of chains. The unusually short Ag(2+)Ag(2+) contact of 3.342 Å within the chain is the shortest Ag(2+)Ag(2+) distance among all structurally characterized compounds of divalent silver. This structural feature is responsible for the 1D antiferromagnetic properties of Na(2)AgF(4) as determined from powder magnetic susceptibility measurements. These findings are rationalized with the aid of calculations of magnetic coupling constants within the framework of the Density Functional Theory including on-site Coulomb repulsion (DFT+U).
Authors:
Dominik Kurzydłowski; Zoran Mazej; Wojciech Grochala
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-28
Journal Detail:
Title:  Dalton transactions (Cambridge, England : 2003)     Volume:  -     ISSN:  1477-9234     ISO Abbreviation:  Dalton Trans     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101176026     Medline TA:  Dalton Trans     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland. dkurzydlowski@chem.uw.edu.pl wg22@cornell.edu.
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