Complete the following reaction sequence by drawing in the neutral reagents and products where necessary. the product of this reaction 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.

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 downfield singlet signal at 12.1 ppm which is characteristic of the acid hydrogens in the carboxylic acids (see figure 1). When a carboxylic group is added to the benzene we will obtain the benzoic acid which fits with the formula and the NMR info given.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.