Which of the following is a reasonable definition of a concerted reaction? O it is a substitution reaction O it is a reaction in which bond breaking occurs first O it is a reaction in which bond forming occurs first O it is a reaction in which all bond breaking and bond forming occurs at the same time
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.
![**Definition of Concerted Reaction**
The below multiple-choice question aims to identify a reasonable definition of a concerted reaction in chemistry.
**Question:**
*Which of the following is a reasonable definition of a concerted reaction?*
- [ ] it is a substitution reaction
- [ ] it is a reaction in which bond breaking occurs first
- [ ] it is a reaction in which bond forming occurs first
- [x] it is a reaction in which all bond breaking and bond forming occurs at the same time
In a concerted reaction, the processes of bond breaking and bond forming happen simultaneously, without intermediate steps. This synchronization is essential to the mechanism and pathway of the reaction.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc6184893-1e67-4ed8-9784-fdd0cf2ed60a%2F4cec88e9-701c-4d2e-b514-e1d63eb34b08%2Fv64zwe_processed.jpeg&w=3840&q=75)
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