Steric hinderance between the ortho hydrogens makes it impossible for the three phenyl rings to be...
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Transcript of Steric hinderance between the ortho hydrogens makes it impossible for the three phenyl rings to be...
Steric hinderance between the ortho hydrogens makes it impossible for the three phenyl rings to be coplanar. Instead
the triphenylmethyl carbocation assumes a “propeller” conformation with the phenyl rings pitched at a 32° angle.
The triphenylmethyl cation can be prepared by reaction of a Grignard reagent with benzophenone to form triphenylmethyl
alcohol. Treatment with fluoboric acid results in the trityl carbocation.
Safety Notes for Expt. 30 – Synthesis of Triphenylmethanol and the Trityl Carbocation
Physical Properties of the Reactants and Reagents in Expt. 30
IR Spectra of bromobenzene and benzophenone
Setup of the round-bottom flask, Claisen adapter, West condenser and addition funnel
A drying tube is added to the top of the condenser