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4

Molybdenum(VI) fluoride can be used as a fluorinating agent though not as popular as the selective DAST and Deoxyfluor as @Waylander noted. Molybdenum(VI) fluoride fall under the category of electrophilic fluorinating agent where it acts as a Lewis acid. The reaction is run in an inert solvent like $\ce{CH2Cl2}$ and a catalyst like boron trifluoride is used. ...

5

As the significance of the two contrasting factors cannot be easily evaluated, let us first look at some evidence. Wan, Modro & Yates (1980) reported the $\ce {pK_a}$ values of the conjugate acids of the various lactams, as shown in the table below: \begin{array}{|c|c|c|c|} \hline \text{Lactam} & pK_a\\ \hline \ce{$\beta$, 4} & -0.96\\ \hline \...

0

I’ll try to keep this explanation simple- if you want a more comprehensive example, please consult books like Orbital Interactions in Chemistry. Oxygen is more electronegative, and hence the Oxygen p orbitals experience a greater effective nuclear charge and have a lower orbital potential energy than the carbon p orbitals. As such, this is effectively ...

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