153802-43-8Relevant academic research and scientific papers
Synthesis and N.M.R. Studies of New Unsymmetrically Substituted Ditertiary Phosphines
Bowmaker, Graham A.,Williams, Julian P.
, p. 451 - 460 (2007/10/02)
The synthesis and characterization of rac- and meso-(E)-1,2-C2H2(PMePh)2 (1), 1,2-C6H4(PMePh)(PPh2) (2), 1,2-C6H4(PBuPh)(PPh2) (3) and 1,2-C6H4(PMe2)(PPh2) (4) are reported.Reaction of (1) with MeI (1:2) gives I2 (5).The compound I (6) was synthesized from (E)-1,2-C2H2(PPh2)2 and MeI (1:1). 1H n.m.r. spectra are reported for (2), (3), (5) and 6. 31P n.m.r. spectra are reported for (1)-(3), (5), (6) and I2 (7). 2J(P(V),H) and trans 3J(H,H) coupling were observed in the 1H n.m.r. spectra of (6).Substitution of one Ph group for one Me group at phosphorus in a ditertiary phosphine produces a change in chemical shift of 19.5 and 21.8 ppm for (E)-CH=CH and 1,2-C6H4 interphosphorus linkages respectively.The interphosphorus linkage in a ditertiary phosphine produces large 3J(P,P) coupling constants (c. 155 Hz), and an increase in screening of the phosphorus nuclei (c. 10 ppm).
Optically Active Asymmetric Bidentate Ligands. Crystal and Molecular Structure of 589-2-phenyl-C2,N>palladium(II) Hexafluorophosphate
Gabbitas, Neil,Salem, Goeffrey,Sterns, Meta,Willis, Anthony C.
, p. 3271 - 3276 (2007/10/02)
Asymmetric bidentate (+/-)-1-(diphenylphosphino)-2-(methylphenylphosphino)benzene has been prepared by the reaction of sodium methylphenylphosphide with 1-chloro-2-(diphenylphosphino)benzene in tetrahydrofuran.The chiral di(tertiary phosphine) has been re
