Complete the following reaction sequence by drawing in the neutral reagents and products where necessary. The product of this re
action has a molecular formula of C7H6O2 and has a 1H NMR spectrum (CDCl3) of ~12.1 (s), 8.1 (m), and 7.6–7.4 (m) ppm. *Show covalent bonds in all compounds.
1 answer:
Answer:
Benzoic acid
Explanation:
In this case we have a Grignard reaction in which we go from a formula of C6H5Br to C7H6O2. In other words, we add 1 carbon to the molecule. The only way to add one carbon to this molecule is using as a reagent. When this compound is used as electrophile a carboxylic acid is produced.
Respect to the NMR info, we have a <u>downfield singlet signal</u> at 12.1 ppm which is characteristic of the <u>acid hydrogens</u> in the carboxylic acids (see figure 1). When a carboxylic group is added to the benzene we will obtain the <u>benzoic acid</u> which fits with the formula and the NMR info given.
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<u>Answer:</u> The concentration of required will be 0.285 M.
<u>Explanation:</u>
To calculate the molarity of , we use the equation:
Moles of = 0.016 moles
Volume of solution = 1 L
Putting values in above equation, we get:
For the given chemical equations:
Net equation:
To calculate the equilibrium constant, K for above equation, we get:
The expression for equilibrium constant of above equation is:
As, is a solid, so its activity is taken as 1 and so for
We are given:
Putting values in above equations, we get:
Hence, the concentration of required will be 0.285 M.