15849-83-9Relevant academic research and scientific papers
Synthesis and Properties of Mixed Substituted (Chloroacetyl)organylphenylphosphanes
Lindner, Ekkehard,Merkle, Ralf Dieter,Mayer, Hermann August
, p. 645 - 658 (2007/10/02)
The mono-, di- and trichloroacetylorganylphenylphosphanes X1X2CClC(O)PPhR (3av-cz) are obtained by reaction of Me3SiPPhR (2v-z) with the azid chlorides X1X2CClC(O)Cl (1a-c).Increasing content of chlorine results in a shift of the >C=O band and the 31P signal to higher wavelengths and fields, respectively, in the IR and 31P NMR spectra of 3av-cz.Due to the centre of chirality at the phosphorus atom in the 1H NMR spectra one observes diastereotopic protons in the chloroacetyl moiety of 3av-az and of the P-adjacent CH2 protons of 3aw-cw and 3ay-cy.The magnetic inequivalence of both methyl substituents in the isopropyl groups of 3ax-cx is observable also in the 13C and 1H NMR spectra.Because of steric reasons the free rotation about the P-isopropyl axis is hindered up to 355 K.From the coalescence temperature the free activation energy ΔG* is calculated to give 74.7 kJ/mole.The degradation of the thermolabile compounds 3av-cz results in the formation of the chlorophosphanes 5v-z.Individual investigations on 3bv, 3bw and 3by indicate the formation of mono- and dichloroacetyl chloride.The appearance of ClCH2C(O)Cl proceeds via the chloroketene 4b.
DARSTELLUNG UND NMR-SPEKTROSKOPISCHE CHARAKTERISIERUNG EINIGER DI-n-ALKYL- UND n-ALKYLARYL-CHLOROPHOSPHANE
Wolfsberger, W
, p. 167 - 174 (2007/10/02)
A series of di-n-alkyl and n-alkylaryl chlorophosphines has been prepared by the reaction of tetraorganodiphosphines with chlorodiphenyl or dichlorophenyl phosphine and characterized by 31P and 13C NMR spectra.
PHOSPHORORGANISCHE VERBINDUNGEN 93 Zur Chemie optisch aktiver Phosphinigsaereamide
Horner, Leopold,Jordan, Manfred
, p. 235 - 242 (2007/10/02)
Optically active ethyl-phenyl-phosphinous acid diethylamide 1 was treated with HCl, HBF4, alcohols, thiols, carboxylic acids, esters, anhydrides, acid chloride, compounds with the structure element P-Cl and secondary phosphines to give in each case a racemic mixture of the corresponding, previously described, reaction products.Reaction of optically active 1 with para-cresol, para-cresyltrifluoro-acetate or 2,2,2-trifluoro-ethyl-trifluoro-acetate gives the corresponding optically active ester of ethyl phenyl phosphinous acid under retention of configuration.
