Reference of 4020-99-9. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 4020-99-9, Name is Methoxydiphenylphosphine
Mono- and dinuclear rhenium polyhydride complexes bearing the chelating ligand 1,2-bis(dicyclohexylphosphanyloxy)ethane
Variable-temperature NMR spectroscopic studies of new rhenium polyhydride compounds of the type [ReH7(dcype)] (1), [Re2H 8(dcype)2] (3) and [ReH5(dcype)L] (5a-f) [dcype = Cy2-PO(CH2)2OPCy2; L = PPh n(OR)3-n, n = 0-2, R = Me, Et] show them to be highly fluxional classical hydride complexes. In the case of the ethoxy compounds 5b, 5d and 5f, three hydride interchange processes were observed in the temperature range 283-173 K and their activation parameters were determined by NMR line-shape analysis. A mechanism is proposed for each. Protonation of 1 and 5 with HBF4¡¤OMe2 gave the nonclassical hydrides [ReH8(dcype)]BF4 (2) and [ReH6(dcype)L]BF 4 (6) which are relatively stable. Compound 2 decomposes at 273 K in solution releasing H2, whereas compound 6 can be stored at room temperature for more than 24 h without decomposition. Protonation of 3 with HBF4¡¤OMe2 gave the classical dinuclear hydride [Re2H9(dcype)2]BF4. ( Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004).
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Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate