State-specific reactions of DBr+((2)Pi(i) , nu(+)) with D-2 and DBr were studied in a low temperature free jet flow reactor. The selected spin-orbit and vibrational states of the DBr+ ion were prepared by resonance-enhanced multiphoton ionization. All of the reactant and product ions were monitored using time-of-flight mass spectrometry. Rate coefficients for the DBr+/DBr reaction are similar to 1.4 x 10(-9) cm(3) s(-1) independent of the ion internal state, similar to those for the HBr+/HBr reaction. Rate coefficients of the DBr+/D-2 reaction rise from 0 (lower spin-orbit-vibrational states) to 2 x 10(-11) cm(3) s(-1) (highest energy states) and are observed to follow a mass independent threshold function similar to the HBr+/H-2 reaction. (C) 2002 Published by Elsevier Science B.V.