Phosphorus

what are phosphines

compounds with the general formula PR3, they are weak bases and good nucleophiles

regarding azides, what reactions have you learnt about them?

staudinger reduction of azides

amine synthesis using azides

Aza-wittig reaction (azide + aldehyde) synthesisinfg imines

staudinger ligation

formation of aziridines from epozides

aza-wittig in silane (silicon) chemistry

what is this molecule?

aziridine

what is this molecule?

azide

what is this molecule?

imine

why is NR3 not as reactive as PR3 with Ph-Br?

Nitrogen lone pair is conjugated into the R groups already therefore already ocupied

what is a ylide

compounds with anionic site adjacent to a heteroatom with a positive formal charge, stabilised by hyperconjugation of anion by a sigma star of adjacent C-P bond

what is produced by deprotonation of phosphonium salt

phosphonium ylide

what is produced by reaction of phosphonium ylide with aldehyde

alkene

what is the wittig reaction

conversion of carbonyl compound into alkene through reaction with a phosphonium ion

what are the two sterioisomers of wittig reaction and how are they formed

cis alkene made when R group is alkyl group, trans alkene made when R group is EWG

what transition state is this?

R=alkyl in wittig reaction, cis

what transition state is this?

R=EWG in wittig reaction, trans

what is the abruzov-michaelis reaction

conversion of trialky phosphite into a phosphonate ester through reaction with an ester halide

what is the horner wardsworth emmans reaction

follows the abrizov-michealis reaction, turns phosphonate ester into alkene via cyclisation

what is this molecule?

phosphene

what is this molecule?

Phosphonium salt

what is this molecule?

Phosphonium ylide

what is this molecule?

phosphorane

what is this molecule?

Phosphonate ester

what is this molecule?

Trialkyl phosphite