Phosphine, ethyldiphenyl

Phosphine, (2-bromophenyl)dichloro-, 2,991 Phosphine, (w-chloroalkyl)dichloro-, 2, 991 Phosphine, chlorodimethyl-, 2, 991 Phosphine, chloro(dimethylamino)-, 2, 991 Phosphine, chlorodiphenyl-, 2, 990 Phosphine, cyclohexyl(o-anisyl)methyl-rhodium complexes asymmetric hydrogenation, 6, 251 Phosphine, [(dialkylphosphino)alkyl]diphenyl-, 2, 994 Phosphine, dichloromethyl-, 2, 991 Phosphine, dichlorophenyl-, 2, 990 Phosphine, diethylphenyl-, 2, 992 Phosphine, dimethyl-, 2,992 Phosphine, dimethylphenyl-, 2,992 Phosphine, diphenyl-, 2, 992 Phosphine, ethyldiphenyl-, 2, 992 Phosphine, ethylenebis(diethyl-, 2, 993 Phosphine, ethylenebis(diphenyl-, 2,993 Phosphine, ethylenebis(phenyl-, 2,992 Phosphine, ethylidynetris[methylene(diphenyl-, 2,994 Phosphine, [(ethylphenylphosphino)hexyl]diphenyl-, 2, 994... 

A variety of chemical quenching studies provide no evidence of carbon configurational stability in a-lithiated phosphine oxides derived from racemic examples (99) and (100) and from single enantiomers (101) and (102), even under conditions of internal quenching at — 78°C where the timescale for inversion/ rotation is short. An even more soisitive probe for configurational stability is the Hoffmann test. Application of this test to phosphine oxide-stabilised anions has involved comparison of the diastereomeric ratio of products from the reaction of lithiated ethyldiphenyl-phosphine oxide with the racemic phenylala-... 

Ethyl diphenylphosphinite, (CgHg)2P.OC2H5, is formed when diphenylchlorophosphine m ether solution is treated with sodium ethoxide. The product is a transparent hquid, B.pt. 179 C. at 14 mm., density 1 0896 at 0 C. It forms an additive compound with copper iodide, M.pt. 190° to 191 C. Under the catalytic influence of ethyl iodide at ordinary temperature it is transformed into ethyldiphenyl-phosphine oxide. During the preparation of the phosphinite some ethyl diphenylphosphinate, (CgH5)2PO(OC2H5), is obtained as a byproduct. 

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