Synthesis and transition metal chemistry of ferrocenylbis(benzo-oxazaphosphininone)

Publication date: Available online 10 March 2018 Source:Journal of Organometallic Chemistry Author(s): Pandey Sameer Prasad, Maravanji S. Balakrishna The new ferrocenylbis(oxazaphosphininone), [Fe{C5H4P(OC6H4)(CO)N-(C2H4Cl)}2] (1) was synthesized by the reaction of bis(dichlorophosphino)ferrocene with two equivalents of 2(2′-hydroxy)phenyloxazoline in the presence of triethylamine in 83% yield. The reactions of 1 with aq. H2O2 or elemental sulfur afforded bis-chalcogenides [Fe{C5H4P(E)(OC6H4)(CO)N(C2H4Cl)}2] (2 E = O, 3 E = S). Treatment of 1 with [M(CO)4(C5H11N)2] (M = Mo, W), [RuCp(PPh3)2Cl] and [M(COD)Cl2] (M = Pd, Pt) afforded the chelate complexes [Fe{C5H4P(OC6H4)(CO)N(C2H4Cl)}2{M(CO)4}] (4 M = Mo, 5 M = W), [Fe{C5H4P(OC6H4)(CO)N(C2H4Cl)}2{RuCp(Cl)}] (7) and [Fe{C5H4P(OC6H4) (CO)N(C2H4Cl)}2{MCl2}] (8 M = Pd, 9 M = Pt), whereas the reaction of 1 with [Ru(η 6-p-cymene)Cl2]2, yielded a bimetallic complex [Fe{C5H4P(OC6H4)(CO)N(C2H4Cl)}2{RuCl2(η 6-p-cymene)}2] (6). The reaction between 1 and CuX in equimolar ratio also yielded binuclear complexes, [Fe{C5H4P(OC6H4)(CO)N(C2H4Cl)}2{CuX}2] (10 X = Cl, 11 X = Br, 12 X = I). All the compounds are characterized by spectroscopic methods and the structures of complexes 3, 7, 9 and 10 were confirmed by single crystal X-ray diffraction studies. The electrochemistry of 1, 3, 8, 9 and 12 is also reported. Graphical abstract

Source: Journal of Organometallic Chemistry - March 11, 2018 Category: Chemistry Source Type: research