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Gd (hfac), NITEt (hfac = hexafluoroacetylacetonate, NITEt = 2-ethyl-4, 4, 5, 5-tetramethyl-4, 5-dihydro-lH-imidazolyl-l-oxyl3-oxide) crystallizes in the monoclinic space group P21/n with cell parameters a = 2006. 4 (4) pm, b = 1706. 4 (4) pm, c = 2267. 3 (2) pm, fi = 113. 82 (1) O, V = 7101. 3 X lo6 pm3, Z = 4, and R, = 0. 076. The crystal structure consists of linear chains made Gd (hfac), moieties linked by bridging nitroxide radicals. The magnetic behavior shows the presence of an antiferromagnetic. Several models for interpreting the magnetic structure are proposed and discussed.
Benelli et al. (Sun,) studied this question.