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- W2074604832 abstract "Arylazo derivatives RuX3(N2Ar)(PPh3)2, OsBr3(N2Ar)(PPh3)2, and RhX2(N2Ar)(PPh3)2 have been prepared by reacting diazonium tetrafluoroborates with the preformed metal phosphine complexes RuX2(PPh3)3, OsBr2(PPh3)3, and RhX(PPh3)3 respectively then adding the appropriate lithium halide to the reaction mixture. The ruthenium and rhodium arylazo complexes are also conveniently prepared by a single step procedure involving addition of the appropriate metal trihalide and 1,3-diaryltriazene to an ethanolic solution of a triarylphosphine. These latter reactions are thought to involve diazonium cations generated in situ by acidolysis of 1,3-diaryltriazene. Products obtained on reacting RhHCl2(PPh3)3 with diazonium tetrafluoroborates and lithium chloride, and previously formulated by other workers as solvated arylazo derivatives RhCl2(N2Ar)(PPh3)2(sol)x(x=½–1; sol = CH2Cl2 or CHCl3), are reformulated as aryldi-imine derivatives RhCl3(NHNAr)(PPh3)2. Similar reactions of the hydrides MHCl(CO)(PPh3)3 and MH2(CO)(PPh3)3(M = Ru or Os) with diazonium salts afford new aryldi-imine derivatives of ruthenium and osmium. The interconversion of arylazo and aryldi-imine complexes is reported and the carbonylation and hydrogenation of some of these products are described. The structure of the aryldi-imine ligands is confirmed by 1H n.m.r. spectroscopy using 15N labelled ligands. Structural and spectroscopic analogies between isoelectronic arylazo and nitrosyl complexes are discussed." @default.
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- W2074604832 date "1973-01-01" @default.
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- W2074604832 title "Complexes of the platinum metals. Part III. Arylazo and aryldi-imine derivatives" @default.
- W2074604832 doi "https://doi.org/10.1039/dt9730002713" @default.
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