Structure and magnetic properties of ferrimagnetic chain formed by manganese(II) and nitronyl nitroxides

摘要

We report the structure of a one-dimensional chain compound formed by manganese(II) hexafluoroacetylacetonate (hfac) and nitroxide radical 2-diethylin-4,4,5,5-tetramethyl-4,5-dihydro-1-imidazol-1-oxy-3-oxide (NITPhNEt_2), Mn(hfac)_2 centre dot NITPhNEt_2. C_2H_5OH, which crystallize in teh monoclinic C2/c space group with a=28.4028(2) A,b=13.4494(8) A,c=23.8493(1) A,#beta#=124.4110(1)deg,and Z=8.In the compound Mn(hfac)_2 units are bridged by the MITPhNEt_2 radical which is cis-coordinated toward the manganese originating a chain.The magnetic susceptibility in the range of temperature 4-300 K is typical of a ferrimagnetic chain formed by alternating spins 5/2 and spin 1/2.