Jacques Navech

Synthesis of the first stable metadithiophosphonate

Synthese du dithioxo tri-t-butyl-2,4,6 phenyl phosphorane par reaction de la dimethylaminomethylene tri-t-butyl-2,4,6 phenyl phosphine avec le soufre S 8

Photochemical reactions of phosphaalkenes

Abstract Photolysis of phosphaalkenes leads to an inversion of polarity of the phosphorus carbon double bond and to a cleavage into transient phosphinidene and carbene ; unexpected alcoholysis of a P III -C bond and the [4+2] cycloaddition of a linear phosphaalkine on a diene are also reported.

Reactivite de quelques phosphor(III)adamantanes et de quelques analogues tricycliques

Abstract The reactivity of some phosphor(III)adamantans has been investigated. New ways of obtention of P(V)derivatives are described.

Les dithiaphospho(III)lanes-1,3,2, noveaux precurseurs de derives du phosphore penta- et dicoordine

Abstract The synthesis of new spirodithiaphospholans is described. Lability of these compounds allows to obtain by an orginally way dicoordinated phosphorus derivatives.

Composes Phosphores Possedant la Structure -P

Abstract Synthesis, structure and reactivity of tricoordinated pentavalent phosphorus derivatives with the structure -P are described. La synthese. la structure et la reactivite de derives du phosphore tricoordonne pentavalent possedant la structure -P sont derites.

Etude de la reactivite du tris(tertiobutyl)phenyldithiophosphorane

Abstract Heating of tris(tertiobutyl)phenyldithiophosphorane gives rise to an isomer with a tetracoordinated phosphorus atom. The action of triphenylphosphine loads to a tricyclophosphathiane which can be transformed in diphosphene by an excess of triphenylphosphine. Reactions with various nucleophilic derivatives (pyridine, triethylamine, diethylamine, butylamine, water, tetraphenylarsonium chloride) are described.

Hétérocycles contenant du phosphore—XIII. Etude par spectrographie infrarouge de quelques dioxaphosphorinanes-1,3,2

Abstract The i.r. spectra of forty-one 1,2,3-dioxaphophorinans have been studied. The dependence of the phosphoryl frequency upon the conformation of the heterocycle is discussed. The characteristic absorption frequencies associated with P → S, P—Cl, P—C 6 H 5 and P—O—C 6 H 5 bonds are given.

1,3,2-diazaphosphole derivatives from the reaction of PCln (NR2)3-n with diaminomaleonitrile

Abstract Condensation of diaminomaleonitrile with PCl 3 , ME 2 NPCl 2 2 N) 2 PCl, (Me 2 N) 3 P or (Et 2 N) 3 P yields the 4,5-dicyano 1,3,2-diazaphosphole ring. In a slower reaction the two cyano groups by adding Me 2 NH or Et 2 NH form a second fivemembered ring to give 1,3,5,2-triazaphosphapentalenes.

ETUDE DE L'ACTION DU SOUFRE SUR LA TRIS(TERTIOBUTYL)PHENYLPHOSPHINE

Abstract Sterically protected tris(tertiarybutyl)phenylphosphine reacts with sulfur, giving rise to the corresponding sulphide which reacts further to produce bis[tris(tertiarybutyl)phenyl]trithiodiphosphinate. This last compound finally affords the first stable metadithiophosphonate.

Etude de l'action de l'azodicarboxylate de diethyle sur la tris(tert-butyl)phenylphosphine

Abstract The reaction of diethylazodicarboxylate with tris(tert-butyl)phenylphosphine gives rise to a σ 3 , γ 5 - phosphorane. Evidence is given for the transient formation of a diazaphosphirldine derivative.