A joint experimental and theoretical analyses based on the grounds of DFT anharmonic potential and the use of a variational method allow us to revisit and assign the gas phase spectra of vinylarsine in the mid-IR area until 6300 cm (1). Several weak and very weak bands corresponding to overtones and combinations are newly observed and assigned in complement to the fundamental bands. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.