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Communications amined, only one gave diffraction of sufficient intensity to permit the hope of a structure determination. Data were collected up to 45" 20 in three shells, with variable scan speeds giving up to 10 min measuring time per reflection. Even so, the mean value of I/o(Z) for the entire data set was 2.7, and only 39 % of the measurements had I > 2u(I), indicative of the weakness of the scattering. The high least-squares residuals, a relatively poor data-to-parameter ratio (6.81), and high standard deviations are representative of the problems encountered. Still, the determination permits the observation of the connectivity, the packing pattern, the spatial relationship between the organic and inorganic components of the crystal, and coarse values for anion-anion and anion-cation separation, the features most related to the interpretation of the magnetic and electrical properties. We do not attempt to derive conclusions based on the exact bond distance or angle values from these structural results. The unit cell of the Fe derivative has been measured on a single crystal. The resulting parameters are a = 7.726(8)A,b = 6 . 2 7 0 ( 3 )~,~= 3 0 . 4 ( 1 )~, c c = 8 7 . 9 ( 1 ) " ,~= 8 8 . 9 ( 2 ) " , y = 88.09(5)"; V = 1470(6)A3. These are very close to those obtained in the Ga derivative, which support the isostructurality of the two salts.[12] The contribution coming from the organic sublattice was obtained from the magnetic measurements performed on the Ga derivative thatshow an almost constant value of the magnetic susceptibility of (2.4-2.6) x 10~3emumol-' in the temperature range 300-20 K. Below this temperature increases, reaching a value of 3.8 x 10" emu mol-' at

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