885665-61-2Relevant academic research and scientific papers
Redox Instability of Copper(II) Complexes of a Triazine-Based PNP Pincer
Mohammadnezhad, Gholamhossein,Amirian, Ali Mohammad,G?rls, Helmar,Plass, Winfried,Sandleben, Aaron,Sch?fer, Sascha,Klein, Axel
, p. 1140 - 1151 (2021/03/08)
The new Cu(I) complex [Cu(PNPNTPh-Ph)Cl] (1) containing the tridentate PNP pincer ligand N,N′-bis(diphenylphosphino)-2,6-diamino-4-phenyl-1,3,5-triazine was obtained from the reaction of [Cu(SMe2)Cl]n with the ligand as ether solvate 1.0.5Et2O. 1 was independently obtained from a reaction mixture containing the ligand and the Cu(II) precursor CuCl2.2H2O in 50 % yield alongside with the Cu(II) coordination polymer [Cu(O2PPh2)2]n (2). From the reaction of Cu(NO3)2 ? 3H2O with PNPNTPh-Ph in the presence of pyridine the complexes [Cu(O2PPh2)2(Py)2(H2O)] (3), [Cu(O2PPh2)(Py)2(NO3)]2 (4), and [Cu(Py)4(NO3)2].Py (5), were obtained, 2, 3, and 4 contain diphenyl-phosphinate ligands. The underlying redox reaction of the ligand and Cu(II) yielding the oxidised ligands observed in the by-products and the Cu(I) product complex was further studied using electrochemistry and UV-vis spectroelectrochemistry. Attempts to synthesise the Cu(II) complex [Cu(PNPNTPh-Ph)(NO3)2] (6) in a mechanochemical experiment gave evidence for this unprecedented species from ESI-MS(+) and EPR spectroscopy but also revealed its very high sensitivity to air and moisture. The catalytic activity of 1 was investigated in the azide-alkyne cycloaddition yielding various 1-benzyl-4-phenyl-1H-1,2,3-triazoles. The environmentally benign (“green”) and cheap EtOH/H2O solvent mixture turned out to be very suitable. Melting points, FT-IR, and NMR spectra of the triazole products were analysed.
Method for producing phosphorus-containing flame retardants
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Page/Page column 14; 15, (2016/02/05)
A method for producing compounds of formula (I) in which the radical R1 is selected from —NH2, —NH2-zAz, and monovalent alkyl and aryl radicals, the radicals A are selected in each case independently of one another from th
