D.D. Nelson et al. (Science 238, 1670 (1987)) examined several weakly bound gas-phase complexes of ammonia in search of examples in which the H atoms in NH₃ formed hydrogen bonds, but found none. For example, they found that the complex of NH₃ and CO₂ has the carbon atom nearest the nitrogen (299pm away): the CO₂ molecule is at right angles to the CeN ‘ bond’,and the H atoms of NH₃ are pointing away from the CO₂. The magnitude of the permanent dipole moment of this complex is reported as 1.77 D. If the N and C atoms are the centres of the negative and positive charge distributions, respectively, what is the magnitude of those partial charges (as multiples of e)?