Deslandres tables

In using the combination difference method to obtain vibrational parameters, cOg, etc., for two electronic states between which vibronic transitions are observed, the first step is to organize all the vibronic transition wavenumbers into a Deslandres table. An example is shown in Table 7.7 for the system of carbon monoxide. The electronic... 

Table 7.7 Deslandres table for the A II system of carbon monoxide ...

TABLE 2 Deslandres table of PN bands (Band-head frequencies in cm. Differences between the entries in rows 0 and 1, 1 and 2 are in parentheses.)... 

Abstract It is the hypothesis of this chapter that diatomic molecular Franck-Condon factors echo the periodicities of atonos. This means that in isoelectronic series, entire Deslandres tables for molecules that are one proton shift away from rare-gas molecules have distinctive behavior relative to other Deslandres tables in the series. An example is in the 21-electron sequence where BeCl, whose chlorine atom is next to the closed-shell magic-number atom argon. The periodicity is found quantitatively and indeed allows for prediction of the vibration frequency for a hypothetical 11 upper state for CCl. 

Starting from the assumption that one of these frequencies corresponds to the v" = 0-> v = 0 transition, make the vibrational assignments by ordering the observed band frequencies v ) into a Deslandres table ... 

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