Page "Dubnium" Paragraph 16

Reaction with the halogens should readily form the pentahalides, DbX < sub > 5 </ sub >.

The pentachlorides of niobium and tantalum exist as volatile solids or monomeric trigonal bipyramidal molecules in the vapour phase.

Thus, DbCl < sub > 5 </ sub > is expected to be a volatile solid.

Similarly, the pentafluoride, DbF < sub > 5 </ sub >, should be even more volatile.