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

We report the structure of a one-dimensional chain compound formed by manga nese(II) hexafluoroacetylacetonate (hfac) and nitroxide radical 2-diethylin -4,4,5,5-tetramethyl-4,5-dihydro-1-imidazol-1-oxy-3-oxide (NITPhNEt2), Mn(h fac)(2). NITPhNEt2.C2H5OH, which crystallize in the monoclinic C2/c space g roup with a = 28.4028(2) Angstrom, b = 13.4494(8) Angstrom, c = 23.8493(1) Angstrom, beta = 124.4110(1)degrees, and Z = 8. In the compound Mn(hfac)(2) units are bridged by the MITPhNEt2 radical which is c is-coordinated towar d the manganese originating a chain. The magnetic susceptibility in the ran ge of temperature 4-300 K is typical of a ferrimagnetic chain formed by alt ernating spins 5/2 and spins 1/2. (C) 2001 Elsevier Science B.V. All rights reserved.