Abstract
A number of new complexes containing trimorpholinophosphine oxide (MORPO) is reported. The compounds have the general formula M(MORPO) n (anion) 2, where M Mg, Ca, Mn, Fe, Co, Ni, Cu, Zn and Cd, n = 1 2 –4 , and anion stands for BF 4 −, NO 3 −, NCS −1, Cl −, Br − and I −. The compounds are identified and characterized by chemical analyses and physical measurements. It is shown that the ligand coordinates via the phosphoryl oxygen atom, yielding tetrahedrally and octahedrally surrounded metal ions. The ligand properties of MORPO are compared with those reported for other phosphoryl ligands. It is concluded that, for solvates, the number of ligands per metal ion is determined by the steric properties of the ligands and, for adducts, also by the type of anion. The actual type of coordination is influenced by the electronic configuration of the metal ions (for solvates) and by the type of anion (for adducts).
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