The Ru complex active for selective sorbic acid hydrogenation to cis-hex-3-enoic acid had been immobilized by means of hydrogen bonds using direct procedure. The immobilized catalyst was tested for selective hydrogenation and gave almost the same results in selectivity as the catalysis in homogeneous phase. The characterization, kinetic experiments and comparison tests were carried out. The stability of the catalyst was increased by the immobilization. (c) 2006 Published by Elsevier B.V.