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.
Determine whether the sollowing are SN1,SN2, E1, or E2 and draw the major product and if more than one can occur, then draw both products
![### Organic Chemistry Reactions Overview
This image contains a series of organic chemistry reactions involving various reagents and starting materials:
1. **Reaction 1:**
- **Starting Material:** A bromoalkane (Br attached to a linear alkane chain).
- **Reagent:** DBU (1,8-Diazabicyclo[5.4.0]undec-7-ene).
- **Description:** This likely represents an elimination reaction where the DBU acts as a base to remove a hydrogen and the bromine, potentially forming an alkene.
2. **Reaction 2:**
- **Starting Material:** A cycloalkane with a leaving group.
- **Reagent:** NaOMe (Sodium methoxide).
- **Description:** Sodium methoxide may act as a nucleophile or base, potentially leading to substitution or elimination, resulting in an ether or an alkene.
3. **Reaction 3:**
- **Starting Material:** A tertiary bromoalkane.
- **Reagent:** KOtBu (Potassium tert-butoxide).
- **Description:** Potassium tert-butoxide, a strong base, may drive an elimination reaction, producing an alkene.
4. **Reaction 4:**
- **Starting Material:** (Aryl structure with bromine and alkyl attachments).
- **Reagent:** Not explicitly visible; involves alkoxide ions.
- **Description:** Such reactions typically involve base-promoted elimination or substitution processes leading to aryl ethers or new carbon-carbon bonds.
5. **Reaction 5:**
- **Starting Material:** Chloromethane and a complex sodium salt of an aromatic compound.
- **Description:** Likely involves the formation of a new carbon-carbon bond through substitution, potentially yielding an ether or similar compound.
6. **Reaction 6:**
- **Starting Material:** A bromoalkane with an alcohol.
- **Reagent:** Implied internal nucleophilic attack by the alcohol group.
- **Description:** Intramolecular reaction possibly leading to the formation of a cyclic ether or substitution product.
These reactions demonstrate the application of various reagents to accomplish organic transformations such as eliminations, substitutions, and formations of new carbon-carbon or carbon-heteroatom bonds.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1b0fb6f0-7854-489d-adf4-53e482a3e72a%2Fdfba3818-e404-4eff-9d00-019d16d8f6dc%2F0kly2w5.jpeg&w=3840&q=75)
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