Reactive Intermediates
In chemistry, reactive intermediates are termed as short-lived, highly reactive atoms with high energy. They rapidly transform into stable particles during a chemical reaction. In specific cases, by means of matrix isolation and at low-temperature reactive intermediates can be isolated.
Hydride Shift
A hydride shift is a rearrangement of a hydrogen atom in a carbocation that occurs to make the molecule more stable. In organic chemistry, rearrangement of the carbocation is very easily seen. This rearrangement can be because of the movement of a carbocation to attain stability in the compound. Such structural reorganization movement is called a shift within molecules. After the shifting of carbocation over the different carbon then they form structural isomers of the previous existing molecule.
Vinylic Carbocation
A carbocation where the positive charge is on the alkene carbon is known as the vinyl carbocation or vinyl cation. The empirical formula for vinyl cation is C2H3+. In the vinyl carbocation, the positive charge is on the carbon atom with the double bond therefore it is sp hybridized. It is known to be a part of various reactions, for example, electrophilic addition of alkynes and solvolysis as well. It plays the role of a reactive intermediate in these reactions.
Cycloheptatrienyl Cation
It is an aromatic carbocation having a general formula, [C7 H7]+. It is also known as the aromatic tropylium ion. Its name is derived from the molecule tropine, which is a seven membered carbon atom ring. Cycloheptatriene or tropylidene was first synthesized from tropine.
Stability of Vinyl Carbocation
Carbocations are positively charged carbon atoms. It is also known as a carbonium ion.
![### E2 Elimination Reaction Practice
**Objective:**
Draw the major and minor products of the E2 elimination shown below. Ignore any inorganic byproducts.
**Starting Molecule:**
- A branched alkane with a bromine (Br) atom attached (halogenated alkane).
**Reaction Conditions:**
- **Reagent:** Strong Base
**Instructions:**
Use the given starting molecule to determine the major and minor organic products formed through an E2 elimination reaction. Consider the stability of the alkenes that will form, taking into account factors such as Zaitsev's rule, which suggests the more substituted alkene (major product) will be favored.
**Diagram Explanation:**
- The molecular structure depicts a skeletal formula of a branched alkane with a bromine atom, representative of a typical E2 elimination starting material.
- A downward arrow indicates the direction of the reaction towards the products.
- The "Strong Base" label suggests a nucleophilic base that will facilitate the E2 elimination.
**Note:**
Please use the drawing tools provided to sketch the structures of the products formed in this reaction.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa3d382fc-a7ea-4104-94a4-11510411c809%2F3ae93d36-62ab-40b8-b835-e8beb5b96d8f%2Fhfzdlfu_processed.png&w=3840&q=75)
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