86539-32-4Relevant articles and documents
Cheletropic reactions in diphosphirane series
Etemad-Moghadam,Tachou,Gouygou,Koenig
, p. 3687 - 3690 (2007/10/20)
In the diphosphirane series, whereas the fragmentation is a side reaction during the photochemical, thermal or cationic ring opening, the oxidation of the phosphorus lone pairs leads quantitatively to the corresponding phosphaalkenes, and the unstable pho
The Reactivity of Diphosphenes towards Electrophilic and Nucleophilic Reagents
Cowley, Alan H.,Kilduff, Jan E.,Norman, Nicholas C.,Pakulski, Marek
, p. 1801 - 1808 (2007/10/02)
The reaction of P22 (2) with a stoicheiometric quantity of HCl leads to (Me3Si)3CP(H)-P(Cl)C(SiMe3)3 whilst an excess of this reagent causes P=P cleavage and results in the formation of PH(Cl).The corresponding reaction with RP=PR (R = 2,4,6-But3C6H2), (1), results in PH(Cl)R, even when 1 equivalent of HCl is used.Protonation of compound (2) with HBF4.Et2O at -78 deg C results in the phosphonium salt >.Protonation of (1) with HBF4.Et2O is more complex and leads ultimately to P=P bond cleavage and insertion of a cationic phosphorus centre into a C-H bond of an ortho-But group.The dication 2+ and the monocation + and + are formed on treatment of (1) with Ag or .The reaction of (1) with excess of sulphur in the presence of 1,5-diazabicycloundec-5-ene results in P=P bond cleavage and formation of a cyclic dithiophosphinic acid.The diphosphene, (1), reacts with LiMe to afford the anion -.Quenching with MeOH affords the diphosphine R(H)P-P(Me)R, whilst treatment of - with OH- causes P-P bond cleavage and formation of the phosphine oxides PH2RO and PH(Me)RO.Treatment of - with HBF4.Et2O produces PH2R and the phosphonium salt .Treatment of (1) with LiBut also results in anion formation, viz. t)R>-, as the major product which on protonation with MeOH gives the diphosphine R(H)P-P(But)R.The corresponding reaction with LiBun gives the related anion and diphosphine.The reaction of (1) with Ks3> results only in the diphosphine R(H)P-P(H)R>.
ISOLATION AND CHARACTERIZATION OF SOME VERY STABLE 1-PHOSPHA-ALLENES: STERICALLY PROTECTED IMINOMETHYLENE- AND ETHENYLIDENEPHOSPHINES
Yoshifuji, Masaaki,Toyota, Kozo,Shibayama, Katsuhiro,Inamoto, Naoki
, p. 1809 - 1812 (2007/10/02)
Very stable iminomethylenephosphine (3) and ethenylidenephosphine (4) were obtained by steric protection with the 2,4,6-tri-tert-butylphenyl group and some of the spectroscopic data are described.