(B) The dihedral angle between H-C1-C2-H in the range of 145-165 degrees (C) The

Question

(B) The dihedral angle between H-C1-C2-H in the range of 145-165 degrees

(C) The protons at C1 and C2 are perpendicular

(D) The protons at C1 and C2 are eclipsed

(E) The dihedral angle between H-C1-C2-H is in the range of 30-60 degrees

(F) None of the statements are correct

Apiose is one of several naturally occurring carbohydrates characterized by a branched carbon chain and is conveniently isolated as the compound shown ("diacetone apiose"). Based on the observation that the protons at C1 and C2 have a coupling constant of 3.7 Hz, choose the correct statement. (See attached image) Multiple Choice

Explanation / Answer

E) The dihedral angle between H-C1-C2-H is in the range of 30-60 degrees

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