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The title systems, including solvated and unsolvated forms, have been studied by de susceptibility measurements. Curie-Weiss fits show that all materials except the unsolvated chloro system, which probably corresponds to an unusual ligand field case, are characterized by a A 4 A 2 ground state. Average g values are in the range 2.05-2.10, while Weiss θ values are negative and increasingly...