Editing Dubnium (section)

=== Chemical ===
[[File:Radiochem 104+ Transactinide.svg|thumb|left|Relativistic (rel) and nonrelativistic (nr) values of the effective charge (Q<sub>M</sub>) and overlap population (OP) in MCl<sub>5</sub>, where M = V, Nb, Ta, and Db]]

Computational chemistry is simplest in [[gas-phase chemistry]], in which interactions between molecules may be ignored as negligible. Multiple authors<ref name="Haire" /> have researched dubnium pentachloride; calculations show it to be consistent with the periodic laws by exhibiting the properties of a compound of a group 5 element. For example, the [[molecular orbital]] levels indicate that dubnium uses three 6d electron levels as expected. Compared to its tantalum analog, dubnium pentachloride is expected to show increased [[covalent bond|covalent]] character: a decrease in the effective charge on an atom and an increase in the overlap population (between orbitals of dubnium and chlorine).<ref name="Haire" />

Calculations of [[Aqueous solution|solution]] chemistry indicate that the maximum oxidation state of dubnium, +5, will be more stable than those of niobium and tantalum and the +3 and +4 states will be less stable. The tendency towards [[hydrolysis]] of cations with the highest oxidation state should continue to decrease within group 5 but is still expected to be quite rapid. [[Complexation]] of dubnium is expected to follow group 5 trends in its richness. Calculations for hydroxo-chlorido- complexes have shown a reversal in the trends of complex formation and extraction of group 5 elements, with dubnium being more prone to do so than tantalum.<ref name="Haire" />