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Conformational studies on ethane-1,2-diol (HOCH2-CH2OH )
Chapter 4, Problem 48SP(choose chapter or problem)
Problem 48SP
Conformational studies on ethane-1,2-diol (HOCH2-CH2OH ) have shown the most stable conformation about the central C-C bond to be the gauche conformation, which is 9.6 kJ/mol (2.3 kcal/mol) more stable than the anti conformation. Draw Newman projections of these conformers and explain this curious result.
Questions & Answers
QUESTION:
Problem 48SP
Conformational studies on ethane-1,2-diol (HOCH2-CH2OH ) have shown the most stable conformation about the central C-C bond to be the gauche conformation, which is 9.6 kJ/mol (2.3 kcal/mol) more stable than the anti conformation. Draw Newman projections of these conformers and explain this curious result.
ANSWER:
Solution:
Step 1
The structure of ethane-1,2-diol (HOCH2-CH2OH ) is,
The Newman projections of this molecule is given by,