( In absolute terms there is good agreement for the (E, ap) for which WMS predicts -104.9 kJ mol -1 at 0 K. Note that the total dipole moment, µ = (µ 2 x +µ 2 y +µ 2 z ) 1/2 , varies considerably from a low of 0.67 D for the (E, ap) to a high of 3.59 D for the (E, sp) conformer.