In concert with a PCM model of benzene (ε = 2.25), however, this combination yields dipole moments that are 1.182 times larger (95% CI: [1.160-1.208]) than experimental gas phase measurements (Figure ). We note that this 95% CI does not overlap with the interval for HF/6-31G* (or HF/aug-cc-pV(T+d)Z). Moreover, the point estimate of 18.2% is more than twice as large as that of HF/6-31G*. This is a surprising observation given that HF/6-31G* gas phase calculations are thought to mimic the condensed phase and that benzene has a relatively low dielectric constant consistent with only nonpolar condensed phase environments.