All syntheses and experiments were conducted under an N2 atmosphere, except diffraction experiments, which were carried out under dry air. [Pd(triphos)(PPh3)](BF4)2 and [Pd(PN H P)Cl]Cl were prepared according to literature methods. NMR spectra were recorded on a Jeol 300 MHz spectrometer. P NMR chemical shifts are reported relative to 85% H3PO4. All 31 P NMR spectra were proton-decoupled. All X-ray data was collected on a Rigaku XtaLab Mini (ROW) diffractometer using Mo-Kα radiation. Crystals were mounted on a nylon loop using Paratone N oil. Experiments were carried out at 173 K. Absorption correction was applied using multi-scan methods (CrysAlisPro; Rigaku, 2018). 33 Initial structure solutions were found using SHELXT and least-squares refinements were performed using SHELXL. Hydrogen atoms were placed ideally.