Ethane Carbon-Carbon Distance Obtained from Infrared Spectra

Abstract

The parallel band of ethane at 2753 cm—1 and the parallel band of ethane‐d6 at 2816 cm—1 have been observed and analyzed. The resultant values of B for C2H6 and C2D6 are 0.6637 cm—1 and 0.4598 cm—1, respectively. From these B values the C–C distance is found to be 1.534 A and the quantity (r CC /2 +r CH cos θ) 2 +r CH /2 2 sin 2 θ=1.866 A where θ=180−∠ HCC . If the r CH value of methane (1.093 A) is assumed, the ∠HCC is 109° 45′.