7. Whch one of the following reagents will not transform an aldehyde to a carboxylic acid ? с) Месоон E) HOA9(NH3)2 then H30* D) Zn(Hg), HCI A) CrOs, H,SO B) KMNO4, H2SO 8. Which one of the following reactions will not produce phenol (PhOH)? PhočCH3 PHOCH3 PhMgBr PhN2* 1) MecOOH H20 Cu2O, H2O 1) LIAIH4 HBr, heat 2) H20, H;O*, heat 2) H2O, H3O* A B C 9. Which one of the following compounds will not react with F3CC=CCF3 in a Diels-Alder reaction - OMe A В C 10. Which one of the following compounds is anti-aromatic? HN: : NH A C E
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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