MICROWAVE SPECTRUM AND STRUCTURE OF VINYL CYANIDE ($\Pi_{2}CC\Pi CN$)
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Date
1958
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Ohio State University
Abstract
“The lengths of C-C single bonds appear to depend primarily on whether the adjacent bonds are single, double or triple bonds. A brief summary of the existing evidence for this relationship will be given. Further evidence has been obtained from the structure of vinyl cyanide. In this molecule the C-C single bond is adjacent to a triple bond at one end and to single and double bonds at the other. Its length was determined to be $1.425 \AA$, a value lying between ${r}(\equiv {C}-{C}\equiv)=1.380 \AA$ and ${r}(-^{\backslash}_/{C}-{C}\equiv)=1.460 \AA$. The struetural parameters of vinyl cyanide are based on the rotational spectra of the normal molecule and of five isotopic species. The ${J}=2\leftarrow 1$ and ${J}=3\leftarrow 2$ a-type transitions were measured for each species as well as several b-type transitions for the normal and denterated molecules. The inertial defect, and the quadrupole coupling constant along the C N bond were also evaluated.”
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Author Institution: Division of Pure Physics, National Research Council