Abstract
Abstract The synthesis of new paramagnetic phosphorus-containing compounds, (para-RAD-phenyl)diphenylphosphine and phosphine oxide (RAD = nitronylnitroxide. tBuNO), is described. Complexation of these phosphines with diamagnetic metal centres yields, for example, intermolecular ferromagnetic interactions with {Mo(CO)5(phosphine)}, antiferromagnetic interactions with {AuCl(phosphine)} and {PdCl2(phosphine)2}, a complex with multiple paramagnetic ligands. Ligation of nitronylnitroxide-containing phosphines to paramagnetic metals is hindered by catalytic nitrogen to phosphorus oxo-transfer to form the corresponding iminonitroxide-substituted phosphine oxide. A molecular square containing two nitronylnitroxide-substituted phosphine oxide ligands and two Mn(hfac)2 units is also described.
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