1.

What is the correct increasing order of stretching frequencies for C ≡ C, C = C and C — C?

A. C — C > C = C > C ≡ C
B. C ≡ C > C = C > C — C
C. C — C > C = C < C ≡ C
D. C ≡ C < C — C > C = C
Answer» C. C — C > C = C < C ≡ C


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