The following statements (parts a-e) describe a specific reaction along with its regio- and/or stereo-control. Match the reaction conditions below (1-8) that correctly corresponds to the statement. Answer with 1, 2, 3, 4, 5, 6, 7, or 8. H₂ 1. Hg(OAc)2, H₂O 1. BH3, THF H₂ Lindlar's cat. Pd/C 2. NaBH4 2. H₂O2, H₂O, OH Condition 4 Condition 1 Condition 2 Condition 3 H3O+ HBr NaNH, HBr H₂O₂ Condition 7 Condition 8 Condition 6 Condition 5 a. Reaction condition for the reduction of an alkyne to a cis-alkene. b. Markovnikov addition of water to a double bond, with no carbocation rearrangement. c. Anti-Markovnikov addition of HBr to a double bond. d. Anti-Markovnikov addition of water to a double bond. e Reaction condition to change 1,2-dimethylcyclohexene into cis-1,2-dimethylcyclohexane.
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.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
