Reduction of azobenzene by neodymium(II), dysprosium(II), and thulium(II) diiodides

Add time:08/25/2019    Source:sciencedirect.com

The diiodides of divalent neodymium (1), dysprosium (2), and thulium (3) LnI2 readily reduce azobenzene under ambient conditions to give binuclear complexes [LnI(THF)2]2(N2Ph2)2 (Ln=Nd (4), Dy (5), Tm (6)). Magnetic measurements and X-ray structural analyses of 5 and 6 revealed that the bridging N2Ph2 ligands are dianions bounded to the trivalent lanthanoid. The complexes displayed photochromic properties. Ytterbium iodide YbI2(THF)2 reacts with N2Ph2 at 80 °C yielding the known [YbI(THF)3]2(N2Ph2)2 (7).

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