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Model molecules approach chain bonds

The model of the chain of hydrogen atoms with a completely delocalized (metallic) type of bonding is outlined in the preceding section. Intuitively, a chemist will find this model rather unreal, as he or she expects the atoms to combine in pairs to give H2 molecules. In other words, the chain of equidistant H atoms is expected to be unstable, so it undergoes a distortion in such a way that the atoms approach each other in pairs. This process is called Peierls distortion (or strong electron-phonon coupling) in solid-state physics ... [Pg.93]

In the SAFT approach, molecules are modelled as associating chains formed of bonded spherical segments (referred to also as monomers), with short ranged attractive sites, of the form described in the previous section, used as appropriate to mediate association interactions (cf. Figure 8.2). The Helmholtz energy is written as the sum of four separate contributions ... [Pg.222]

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See also in sourсe #XX -- [ Pg.27 ]



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Model molecules approach chain

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