QUESTION: determine the structures of Compounds A, B, C, D, and E. Show calculations. Support all of your structure determinations.

Student performed a sodium borohydride reduction experiment. He followed a standard procedure for performing such reduction reactions and workup and isolation protocols. Student's starting material was Compound A. In his reduction reaction with Compound A, he obtained four products, Compounds B, C, D, and E. In an elemental analysis experiment, Compound A was shown to be 81.05% carbon and 4.55% hydrogen. In separate elemental analyses experiments, Compounds B, C, D, and E were shown to be 79.60% carbon and 6.25% hydrogen.

I calculated for compound A:

C=6.748 mol

H=4.514 mol

O=0,900 mol

6.748 mol C/0,900 mol= 7.4977

4.514 mol H/0,900 mol= 5.0155

0,900 mol O/0,900 mol= 1.0

What is the final empirical for mula of compound A?

I calculated for compounds B,C,D,E:

C=6.627 mol

H=6.2 mol

O=0.884 mol

6.627 mol C/0.884 mol= 7.49

6.2 mol H/0.884 mol= 7.01

0.884 mol O/0.884 mol= 1.0

What is the final empirical for mula of compounds B,C,D,E (isomers)?