Microwave Spectra of ¹³C-species of cis, trans-Ethyl Nitrite, ¹³ CH₃CH₂ONO and CH₃¹³CH₂ONO

Abstract

The microwave spectra of ¹³C-species of cis, trans-ethyl nitrite were observed in the frequency range from 10 to 34 GHz. The following rotational constants for the ground state were determined;
A B C
¹³CH₈CH₂ONO 18018.90 ± 0.08 MHz 2931.14±0.01 MHz 2604.68±0.01 MHz
CH₃¹³CH₂ONO 17868.37±0.10 MHz 3008.28±0.01 MHz 2662.09±0.01 MHz
The rs value of C-C bond length of this isomer was calculated to be 1.517±0.004Å. The present C-C bond length is compared with the rs, (C-C) values reported for analogous molecules containing ethyl group, and the dependence of the C-C length on the electronegativity of the adjacent atom is discussed.