H+/h20?

[utdent20]

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Alright I am getting super confused in the following.
1. when H30+ is used, it is a reducing agent or an oxidizing. will it give an alcohol?
2. when OH-/H20 occurs? Is this aldol condensation always? and if it is I don't understand what exactly happens in aldol, are we adding the another molecule of the same atom?
3. What happens when siimply H+/H20 undergoes a reaction?

 

[klutzy1987]

Alright I am getting super confused in the following.
1. when H30+ is used, it is a reducing agent or an oxidizing. will it give an alcohol?
2. when OH-/H20 occurs? Is this aldol condensation always? and if it is I don't understand what exactly happens in aldol, are we adding the another molecule of the same atom?
3. What happens when siimply H+/H20 undergoes a reaction?

1) H3O is an acid, it will always give off protons. There is no electron transfer though and there is never a change in oxidation state.

2)When you use OH-/H20 with an aldehyde it will give the aldol. If used with a ketone it will give an adol, but there will be many products abecause both sides of the ketone have alpha hydrogens. Therfore unless it is a ketone that only has one set of alpha H's ketones will not be used in aldol's.

3) I dont understand what you mean by this question. It depends on the particular reaction as to what that does, but usually as a reagent is is a hydrogen donor/acceptor.

 

[utdent20]

With the third one, i just meant if a reaction is undergoes heat. does it lead to elimination of the double bond.. for e.g # 30 in destoryer.. its diel alder rxn.

 

[klutzy1987]

With the third one, i just meant if a reaction is undergoes heat. does it lead to elimination of the double bond.. for e.g # 30 in destoryer.. its diel alder rxn.

Well H2O can be added across a double bond to give an alcohol, but again it depnds on the conditions etc..