Cj. Benmore et Bl. Tomberli, The structure of carbon dioxide around naphthalene investigated using H/D substitution in neutron diffraction, IND ENG RES, 39(12), 2000, pp. 4491-4495
The technique of hydrogen/deuterium substitution in neutron diffraction has
been used to investigate the intermolecular structure of carbon dioxide sa
turated with naphthalene at supercritical pressure. The experiment was perf
ormed at P = 206 bar and T = 302 K, corresponding to a dilute concentration
of approximately 1 C10H8 molecule to 110 CO2 molecules. Particular attenti
on has been paid to the local structural environment of the hydrogen atoms
through the extraction of the first-order neutron difference function. The
neutron data show that eight nearest-neighbor CO2 molecules form a well-def
ined ring around the hydrogen atoms on the naphthalene molecule. Moreover,
the CO2 molecules appear to be oriented perpendicular to the plane of the n
aphthalene molecule at a distance of r(H-CO2) = 3.3 Angstrom.