[T]

Hello,

The question is what is the movement of electrons in the attached pictures.

For the first reaction:

What I think will happen is the H⁺ has separated from the NH₃ and the OH^- has bonded with the H to form H₂O. Something needs to replace the OH's spot in the molecule so the NH₃ will turn into NH₂ and H⁺. The NH₂ will take the OH spot while the H+ will join with the H₂O to form H₃O⁺. Is this right?

For the second reaction:

From my understanding, ethene can be hydrogenated to form ethane. However there is only 1 hydrogen available. If the double bond breaks and 1 of the carbon bonds with the hydrogen then the other carbon will not have enough electrons. Could someone give me a hint?

Thanks

[Dan]

For the first reaction:

What I think will happen is the H⁺ has separated from the NH₃ and the OH^- has bonded with the H to form H₂O. Something needs to replace the OH's spot in the molecule so the NH₃ will turn into NH₂ and H⁺. The NH₂ will take the OH spot while the H+ will join with the H₂O to form H₃O⁺. Is this right?

There is no H₂O in this question, and there is certainly no NH₂ produced. It is difficult to follow what you have written - it is better to draw (or use precise scientific terminology).

For the second reaction:

If the double bond breaks and 1 of the carbon bonds with the hydrogen then the other carbon will not have enough electrons. Could someone give me a hint?

You are correct that protonation of an alkene will leave behind an electron deficient C. Have you learnt about carbocations?

[T]

There is no H₂O in this question, and there is certainly no NH₂ produced.

Since there is no NH₂ produced, would it be safe to assume that after the H⁺ leaves the NH₃ the NH₃ does nothing more in the reaction?

Have you learnt about carbocations?

So I read about carbocations on this site: http://www.chemguide.co.uk/mechanisms/eladd/carbonium.html

From what I read, it is possible that the reaction could turn into CH₂ - CH₃. Since alkyl groups "push" away electrons then the + CH₂ would turn a bit negative because of the pushing. So I gather that the answer would be
CH₂ - CH₃?

Thanks

[Dan]

So I gather that the answer would be
CH₂ - CH₃?

Check your charge balance.

[T]

CH₂⁺ - CH₃?