Z. Kisiel et al., The gas-phase electric dipole moments of the symmetric top tertiary butyl molecules (BuX)-Bu-t, X = F, Cl, Br, I, CN, and NC, J MOL SPECT, 208(1), 2001, pp. 113-120
The electric dipole moments of symmetric top tertiary butyl derivatives wer
e determined from Stark effect measurements made with cavity Fourier transf
orm microwave spectroscopy under conditions of supersonic expansion. The re
sulting values are 1.9562(15), 2.1817(16), 2.2574(17) and 2.2122(17) D for
tertiary butyl fluoride, chloride, bromide, and iodide, and 4.0129(30), and
3.0640(31) for tertiary butyl cyanide acid isocyanide, respectively. The e
xperimental values are compared with ab initio calculations acid with exper
imental and calculated dipole moments for the corresponding methyl derivati
ves. (C) 2001 Academic Press.