Crystal structures and magnetic properties of linear trinuclear heterometallic complexes based on [(Tp)Fe(CN)3]−

✍ Scribed by Jin-Zhong Gu; Long Jiang; Min-Yu Tan; Tong-Bu Lu

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 309 KB
• Volume: 890
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2007.12.003

✦ Synopsis

Using [(Tp)Fe(CN) 3 ] À (Tp = hydrotris(pyrazolyl)borate) as a building block, four trinuclear complexes [M II (DMSO) 4 ][(Tp)Fe(CN) 3 ] 2 (M II = Co, 1; Ni, 2; Mn, 3; Cu, 4) (DMSO = dimethyl sulfoxide) have been prepared and their structures and magnetic properties have been studied. Complexes 1-4 are isostructural and crystallize, in which each M II ion is coordinated by two [(Tp)Fe(CN) 3 ] À moieties through cyano-bridges in trans positions, resulting in a linear trinuclear structure. The magnetic properties of 1-4 have been investigated in the 2-300 K temperature range. Ferromagnetic coupling occurs in cyano-bridged Ni II -NC-Fe III , Mn II -NC-Fe III and Cu II -NC-Fe III while antiferromagnetic exchange is present between Co II and Fe III ions. The correlations between the structures and the J values are discussed.