The 1:1 complex between quinuclidine and trifluoromethane has been investigated using pulsed jet Fourier transform microwave spectroscopy. The two constituting molecules are held together through a weak C-H center dot center dot center dot N hydrogen bond, with a H center dot center dot center dot N length of 2.070(1) angstrom. The C-3 symmetric axes of the two moieties are collinear, making the overall molecular system a symmetric top. The HCF3 subunit is freely rotating with respect to the amine moiety. Transitions for the ground (m = 0) and for the first excited (vertical bar m vertical bar = 1) torsional states, with K up to 2, have been measured, all of them showing the N-14 nuclear quadrupole hyperfine structure. The dissociation energy of the complex has been estimated to be 10.2 kJ mol(-1).