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

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 C(1) and C(2) have a coupling constant of 3.7 Hz, choose the correct statement. (a) The C(1) and C(2) protons are eclipsed. (b) The H C(1) C(2) H dihedral angle is in the range 30–60°. (c) The H C(1) C(2) H dihedral angle is in the range 145–165°. (d) The C(1) and C(2) protons are anti. Transcribed Image Text: H
Lo
H
Diacetone apiose

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