“…Some starting hexacarbonyl (0.010 g) and some [Os,(MeC0,),(CO),(PPh3)2] (0.015 g) were also obtained. (0.100 g) as yellow crystals (0.060 g, 57%) (Found: C, 26.2; H, 2.25; P, 3 (0.1 10 g) in acetonitrile (20 cm3) was heated under reflux for 30 min. Evaporation of the solvent gave the product as somewhat air-sensitive pale yellow plates (0.101 g, 88%) (Found: C, 21.2; H, 1.8; N, 3.9.…”