F. Build each of the molecules (a, b, c and d) drawn below (team/group work)__ Br Br Br Br b) C) d) e) CI-C-H CI-C-H a) H -CI CI-C-H CI C H- -H -CI 2) What is the relationship of molecule a to molecule b? a)same molecule b)enantiomers 3) What is the relationship of molecule a to molecule c? a)same molecule b)enantiomers H 4) What is the relationship of molecule a to molecule d? a)same molecule b)enantiomers H- c) structural isomers -CI -Ċ-CI c) structural isomers c) structural isomers Br H- |_ci CI-C d)another type of isomerism d)another type of isomerism d)another type of isomerism
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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