The remaining four residuals are hardly significant, corresponding to the (1.81, −1.79) and (1.62, −1.56) cm –1 pairs for (ω 28 , ω 29 ) and (ω 3 , ω 2 ) of n -butane and isobutane, respectively.
1
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The remaining four residuals are hardly significant, corresponding to the (1.81, −1.79) and (1.62, −1.56) cm –1 pairs for (ω 28 , ω 29 ) and (ω 3 , ω 2 ) of n -butane and isobutane, respectively.