Syntheses,structures and catalytic properties of new mononuclear terpyridine-manganese(II) complexes with tetraphenylimido-diphosphinate and diphenylphosphinate ligands |
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| Authors: | Ying Zhang Ai-Quan Jia Jing-Jing Zhang Zhifeng Xin |
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| Institution: | Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma’anshan, Anhui, P. R. China |
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| Abstract: | Treatment of manganese(II) acetate tetrahydrate Mn(CH3COO)2·4H2O] with one equivalent of 2,2′:6′,2′′-terpyridine (terpy) and two equivalents of potassium tetraphenylimido-diphosphinate KN(Ph2PO)2] in methanol afforded a mononuclear manganese(II) complex, (terpy)Mn{η1-O-N(Ph2PO)2}2(H2O)] (1), with two terminal N(Ph2PO)2]– ligands. Interaction of Mn(CH3COO)2·4H2O] with one equivalent of terpy in the presence of both KN(Ph2PO)2] and Ph2PO2K in methanol gave a mononuclear manganese(II) complex (terpy)Mn(η1-O-O2PPh2){N(Ph2PO)2}] (2) with a chelated N(Ph2PO)2]– ligand. Treatment of manganese(II) dichloride tetrahydrate MnCl2·4H2O] with three equivalents of KN(Ph2PO)2] in methanol resulted in isolation of a mononuclear manganese(III) complex Mn{η1-O-N(Ph2PO)2}-{N(Ph2PO)2}2] (3) with one terminal and two chelated N(Ph2PO)2]– ligands. Reaction of Mn(CH3COO)2·4H2O] with one equivalent of 4′-phenyl-2,2′:6′,2′′]-terpyridine (4-Ph-terpy) and two equivalents of Ph2PO2K in methanol gave (4-Ph-terpy)Mn(η1-O-O2PPh2)2(H2O)] (4) with a labile water molecule. Complexes 1–4 have been spectroscopically characterized and their structures have been established by single-crystal X-ray diffraction. Catalytic behavior of 1 and 4 for sulfide oxidation was also investigated. |
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| Keywords: | Manganese complex terpyridine tetraphenylimidodiphosphinate diphenylphosphinate crystal structure oxidation of sulfide |
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