Compound 1 displays evidence for dynamic behavior in solution by 1 Compound 1 was found to be an active hydrophosphination catalyst. Treatment of a benzene-d6 solution of styrene, diphenylphosphine, and 6 mol% of 1 under 360 nm irradiation resulted in a 94% NMR conversion to the hydrophosphination product, diphenyl(2-phenylethyl)-phosphine (5), after 24 h (eq. 4). We did not purse further hydrophosphination reactivity given this derivative compound showed no improvement in reactivity compared to Cu(acac)2 .