Molecular gᅩ-value, Magnetic Susceptibility Anisotropy, and Deuterium Quadrupole Coupling Constantin Deuterodiacetylene

The rotational Zeeman effect in the J'→J=2→1 rotational transition and the deuterium quadrupole coupling effect in the J'→J=1→0 transition have been observed for D-C≡C-C≡C-H using a microwave Fourier transform spectrometer. The molecular parameters determined are: rotational constant B o , deuterium quadrupole coupling constant, molecular g ⊥ -value and molecular magnetic susceptibility anisotropy (χ ⊥ -χ ∥ )