142370-22-7Relevant academic research and scientific papers
Synthesis and Characterization of Some Rhenium Complexes with the New Mixed Phosphorus-Nitrogen Donor Ligand NPh(CH2CH2PPh2)2
Michos, Demetrius,Luo, Xiao-Liang,Crabtree, Robert H.
, p. 1735 - 1738 (2007/10/02)
Reaction of NPh(CH2CH2Cl)2 with LiPPh2 at 0 deg C yields the new mixed nitrogen-phosphorus donor ligand NPh(CH2CH2PPh2)2 (L).Reaction of with L in CH2Cl2 at room temperature gives 3.Reaction of with L in refluxing benzene gives 4.Treatment of 3 or 4 with LiAlH4 at 0 deg C in Et2O affords 5.Protonation of 5 with HBF4*OEt2 in CD2Cl2 at 193 K gives + 6.Deprotonation of 6 with NEt3 regenerates 5 quantitatively.Compound 5 shows a 1H NMR T1 (minimum) value of 78 ms at 250 MHz, consistent with a classical structure having only terminal hydride ligands, while 6 shows a T1 (minimum) value of 10 ms, suggesting a non-classical structure containing one or more η2- H2 ligands.
