Why alkyl fluoride is more reactive than alkyl iodide?

The relative order of alkyl halide reactivity is governed by the carbon-halogen bond strength. Alkyl iodides have the weakest carbon-halogen bond and react at the fastest rate. Alkyl fluorides have the strongest carbon-halogen bond and react so slowly as to rarely undergo nucleophilic substitutions.

Which is most reactive towards Friedel Crafts alkylation?

The ortho and para positions are reactive towards the electrophile. The reaction takes place even in presence of poor electrophile. Hence the methyl group is 25 times more reactive than the benzene. Therefore, the group which is highly reactive towards Friedel craft acylation is the toluene.

Why is iodide more reactive than fluoride?

Some factors influencing this are: The electron affinity of fluorine is much larger, which makes reduction to fluoride much easier. E−F bonds are stronger than E−I bonds, in both an ionic and covalent sense. Fluoride has a larger solvation enthalpy than iodide.

What compounds are most reactive towards alkylation?

This means that an RF haloalkane is most reactive followed by RCl then RBr and finally RI. This means that the Lewis acids used as catalysts in Friedel-Crafts Alkylation reactions tend have similar halogen combinations such as BF3, SbCl5, AlCl3, SbCl5, and AlBr3, all of which are commonly used in these reactions.

Is fluoride or iodide more reactive?

This is the opposite trend to that seen in the alkali metals in Group 1 of the periodic table . Fluorine is the most reactive element of all in Group 7. You can see the trend in reactivity if you react the halogens with iron wool. The reaction is faster than that of iodine but slower than that of chlorine.

Why is fluoride so reactive?

fluorine (F), most reactive chemical element and the lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. Its chemical activity can be attributed to its extreme ability to attract electrons (it is the most electronegative element) and to the small size of its atoms.

Why primary alkyl halide is more reactive in SN2 reaction?

Primary alkyl halides undergo SN2 mechanisms because (a) 1° substrates have little steric hindrance to nucleophilic attack and (b) 1° carbocations are relatively unstable.