Abstract

[15133-82-1] C72H60NiP4 (MW 1107.89) InChI = 1S/4C18H15P.Ni/c4*1-4-10-16(11-5-1)19(17-12-6-2-7-13-17)18-14-8-3-9-15-18;/h4*1-15H; InChIKey = KFBKRCXOTTUAFS-UHFFFAOYSA-N (a source of nickel(0) useful for coupling reactions of organic halides,2 and the cyclooligomerization of cumulenes3) Physical Data: mp 123–128 °C (N2). Solubility: sol DMF, DMA, THF, acetonitrile, benzene; slightly sol Et2O; very slightly sol n-heptane, EtOH. Form Supplied in: widely available as a red powder of greater than 98% purity. Preparative Methods: the standard preparation involves the reduction of Nickel(II) Acetylacetonate with Triethylaluminum in the presence of Triphenylphosphine. To 21.3 g of anhydrous Ni(acac)2 and 125 g PPh3 in 800 mL of Et2O under N2 at 0 °C is slowly added 28.0 g Et3Al. The reddish-brown precipitate is collected, washed with Et2O, and twice dissolved in benzene and reprecipitated by the addition of n-heptane to give about 50 g (55%) of Ni(PPh3)4.4 Handling, Storage, and Precautions: highly oxygen sensitive. Special inert-atmosphere techniques must be used.5 Should be stored at 0 °C. Cancer suspect agent.

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