Continue the synthesis by selecting the reagents necessary for the next transformation shown. ? Br The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A B C EtONa HBr, ROOR H2, Lindlar's cat. D E F HBr HC=CNa H₂, Pd G H | 1) 03; 2) DMS 1) NaNH2; 2) EtBr 1) R₂BH; 2) H₂O2, NaOH
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.
#### Description:
The transformation displayed involves converting an alkyne to a bromo-alkene. The task is to identify the correct sequence of reagents required to accomplish this transformation, using the options provided below.
#### Instructions:
The transformation above can be performed with some reagent or combination of reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer.
#### Reagents List:
- **A**: EtONa
- **B**: HBr, ROOR
- **C**: H\(_2\), Lindlar's cat.
- **D**: HBr
- **E**: HC≡CNa
- **F**: H\(_2\), Pd
- **G**: 1) O\(_3\); 2) DMS
- **H**: 1) NaNH\(_2\); 2) EtBr
- **I**: 1) R\(_2\)BH; 2) H\(_2\)O\(_2\), NaOH
![Answer Box]
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Note: The diagrams represent different stages of the organic synthesis process. Each step utilizes specific reagents to modify the molecular structure strategically.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4167b07b-ab2c-42e3-ab89-9f12261de975%2F88ac810f-e135-424e-845b-15221a35489f%2Fdt3o0dw_processed.png&w=3840&q=75)
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