5. A beaker weighs 155.1 g when it is empty. When filled with water (density 1.00 g/mL), the flask and its contents weigh 375.8 g. (i) what is the flask's volume? (ii) How much does the flask weigh when filled with chloroform (density = 1.48 g/mL)? a) Volume of flask = 220.7 mL; weight flask + chloroform 326.6 g b) Volume of flask = 220.7 mL; weight flask + chloroform 375.8 g c) Volume of flask = 375.8 mL; weight flask + chloroform 530.9 g d) Volume of flask = 220.7 mL; weight flask + chloroform = 481.7 g e) Volume of flask = 155.1 mL; weight flask + chloroform = 375.8 g
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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