Show how to accomplish the following conversion using reagents from the table. Br Br When only one enantiomer is shown, it is to indicate relative stereochemistry. Reactants and/or products are racemic. Reagents available a. CH3 CH2O¯Na+ b. OsO4, H2O2 c. HCI d. RCO3H, CH2 Cl2 f. Br2, CCl4 8. 1. ВН3, 2. Н2О2, NaOH, H20 e. HBr h. HIO4 i. k. 1. O3 2. (CH3)2S H20/ H2 SO4 j. Br2, heat 1. NaCl (Note that some syntheses require only one step, whereas others require two or more. Write a string of letters (e.g. abc) to indicate the sequence in which reagents are used. If more than one answer is possible, just give one.) Reagents =
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.
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