Magnetic studies of vanadyl(IV) tartrate dimers |
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| Authors: | Van H Crawford William E Hatfield Robert E Tapscott |
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| Institution: | Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27514 U.S.A.;Department of Chemistry, University of New Mexico, Albuquerque, New Mexico 87131 U.S.A. |
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| Abstract: | Temperature-dependent magnetic susceptibility data have been collected for solid sodium salts of the binuclearvanadyl(IV) complexes (VO)2(d-tart)2]4?, (VO)2(dl-tart)2]4?, (VO)2(dl-mmt)2]4?,and (VO)2(dl-dmt)2]4?. (“tart” = tartrate(4?), “mmt” = monomethyl-tartrate(4?), “dmt” = dimethyltartrate(4?).) Ferromagnetic intradimer- and antiferromagnetic interdimer exchange is found; however, both interactions are small and similar in magnitude and reliable exchange constants cannot be extracted. The intradimer interaction probably occurs by a superexchange mechanism. |
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