Department of Chemistry, University of Guelph, Guelph, ON, N1G 2W1, Canada.
Chem Commun (Camb). 2010 Sep 21;46(35):6569-71. doi: 10.1039/c0cc01084g. Epub 2010 Aug 16.
The Mn(hfac)(2) complex of the paramagnetic 4-(benzoxazol-2'-yl)-1,2,3,5-dithiadiazolyl ligand is reported (hfac = 1,1,1,5,5,5-hexafluoroacetylacetonato-). The Mn(ii) and radical ligand spins are coupled antiferromagnetically (AF) in the coordination complex. Short sulfur-oxygen contacts between molecules provide an efficient pathway for AF coupling between the radical ligand of one molecule and the Mn(ii) of a neighbouring molecule, resulting in a large total spin ground state (S(T) = 4) for a pair of molecules.
报道了顺磁的 4-(苯并恶唑-2'-基)-1,2,3,5-二噻唑基配体的 Mn(hfac)(2) 配合物（hfac = 1,1,1,5,5,5-六氟乙酰丙酮酸根）。在配位化合物中，Mn(ii)和自由基配体的自旋呈反铁磁耦合（AF）。分子间的短硫-氧接触为自由基配体与相邻分子的 Mn(ii)之间的 AF 耦合提供了有效的途径，导致一对分子的总自旋基态（S(T) = 4）很大。
