What type of reaction is #CH_3CH_3 + Cl_2 → CH_3CH_2Cl + HCl#?

Answer 1

This is actually a multi-step mechanism for a radical chlorination of ethane. You can always tell by knowing you are starting with an alkane and are reacting with a diatomic halogen. There are no other "standard" reactions like this.

OVERALL

#color(blue)("CH"_3"CH"_3 + "Cl"_2 stackrel(Delta, "or "hnu" ")(->) "CH"_3"CH"_2"Cl" + "HCl")#

The reaction mechanism is shown below.

INITIATION STEP

#color(blue)("Cl"_2) stackrel(Delta, "or "hnu" ")(=>) 2"Cl"cdot#

PROPAGATION STEPS

#color(blue)("CH"_3"CH"_2"H") + cdot"Cl" => "CH"_3"CH"_2cdot + color(blue)("HCl")#

#"CH"_3"CH"_2cdot + color(blue)("Cl"_2) => color(blue)("CH"_3"CH"_2"Cl") + "Cl"cdot#

TERMINATION STEPS

#"H"_3"C"-"CH"_2cdot + cdot"H"_2"C"-"CH"_3 => "CH"_3"CH"_2"CH"_2"CH"_3#

#"Cl"cdot + cdot"Cl" => color(blue)("Cl"_2)#

#"CH"_3"CH"_2cdot + "Cl"cdot => color(blue)("CH"_3"CH"_2"Cl")#

Note that all of this occurs until the all reactant is consumed, so don't fret over the fact that what is shown here does not explicitly demonstrate conservation of mass.


You can see a more detailed version here, but for bromine with propane instead of chlorine with ethane.

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Answer 2

This is an example of a substitution reaction.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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