The ground state rotational spectrum of 2,3,6-trifluoropyridine has been investigated in the 2.0-20.0 GHz region by pulsed jet Fourier transform microwave spectroscopy.The experimental rotational constants are A=3134....The ground state rotational spectrum of 2,3,6-trifluoropyridine has been investigated in the 2.0-20.0 GHz region by pulsed jet Fourier transform microwave spectroscopy.The experimental rotational constants are A=3134.4479(2)MHz,B=1346.79372(7)MHz,and C=941.99495(6)MHz.The transitions are so intense that rotational transitions of all mono13C and 15N isotopologues are measured in natural abundance.The semi-experimental equilibrium rotational constants of the 7 isotopologues were derived by taking account of the anharmonic vibrational corrections,which allowed a semi-experimental determination of the equilibrium structure of 2,3,6-trifluoropyridine.展开更多
基金the National Natural Science Foundation of China(No.21703021 and No.U1931104)the Natural Science Foundation of Chongqing,China(No.cstc2017jcyjAX0068 and No.cstc2018jcyjAX0050)+2 种基金Venture&Innovation Support Program for Chongqing Overseas Returns(No.cx2018064)Foundation of 100 Young Chongqing University(No.0220001104428)Fundamental Research Funds for the Central Universities(No.106112017CDJQJ228807 and No.2018CDQYHG0009).
文摘The ground state rotational spectrum of 2,3,6-trifluoropyridine has been investigated in the 2.0-20.0 GHz region by pulsed jet Fourier transform microwave spectroscopy.The experimental rotational constants are A=3134.4479(2)MHz,B=1346.79372(7)MHz,and C=941.99495(6)MHz.The transitions are so intense that rotational transitions of all mono13C and 15N isotopologues are measured in natural abundance.The semi-experimental equilibrium rotational constants of the 7 isotopologues were derived by taking account of the anharmonic vibrational corrections,which allowed a semi-experimental determination of the equilibrium structure of 2,3,6-trifluoropyridine.
