Method A: In an N2 filled glovebox, P( t Bu)3 (51 mg, 0.25 mmol), Cu(I)Cl (25 mg, 0.25 mmol) and 5 mL of cold THF (stored at -30 °C and removed immediately before use) were stirred in a scintillation vial. After 30 seconds, a KPPh2 (56 mg, 0.25 mmol) solution in 5 mL of cold THF was added dropwise resulting in a color change to yellow. The solution was stirred for 30 min at ambient temperature, then concentrated to a yellow residue under reduced pressure. The crude product was redissolved pentane and filtered through a bed of Celite. The filtrate was immediately pipetted into a scintillation vial and placed in a freezer at -30 °C. Crystals suitable for X-ray crystallography precipitated overnight. To isolate the product for NMR the mother liquor was decanted from the precipitate, and the precipitate was washed with 2 mL of cold pentane and dried in vacuo. Yield 57 mg (65%).