PH-funktionelle Phosphane mit α- und β-ständigen 2-Pyridylsubstituenten 2-C5H4N—[CH2]n—PRH (R = H, iPr, tBu, Ph, 2-C5H4N-[CH2]n; n = 1, 2) / PH-Functional Phosphanes with 2-Pyridyl Substituents in α- or β-Position 2-C5H4N —[CH2]n—PRH (R = H, iPr, tBu, Ph, 2-C5H4N-[CH2]n; n = 1,2)

PH-functional phosphanes containing a 2-pyridyl substituent in α- or β-position to phosphorus, e.g. 2-C5H4N - [CH2]n-PRH (R = H, iPr, tBu, Ph; n = 1,2) have been obtained. The reactivity of the PH-groups can be employed for the synthesis of tridentate NPN-hvbrid donors. [2-C5H4N -CH2-CH2]2PR (R = H. Ph). The phosphanes 2-C5H4N-[CH2]n-PRH behave as monodentate ligands in transition metal complexes and form labile chelate ring systems. They may bridge metal-metal bonds to form seven membered ring systems, e.g. Mo2PC3N. The coordination of the N-donor of the ligands 2-C5H4N - [CH2]n-PRH to a transition metal atom is indicated by a lowfield shift and a small 31P - 13C-splitting of the 13C{1H} NMR signal of carbon atom 6 in the pyridin ring system.