On the grounds of CCSD(T) and DFT anharmonic potential and the use of a variational method, the vibrational spectra of vinyl-phosphine and one of its isopotomer are calculated and the IR spectra in the gas phase revisited between 600 and 6300 cm(-1). The agreement between calculated and observed frequencies is fairly good for all fundamentals. These joint experimental and theoretical analyses allow us to assign (very) weak combinations and overtones bands observed in the regions revisited. (c) 2006 Elsevier B.V. All rights reserved.