III International Conference

PP-II-155reaction are shown on the catalyst with 5 % Eu that correlates with results onthermodesorption of hydrogen from the modified catalysts. The catalyst with 5 % Eu ischaracterized by the contents of hydrogen by 2,4 times exceeding those for the initial coppercatalyst. The amount of atomic and molecular hydrogen at change of europium contentspasses through a maximum corresponding to the catalyst with 5 % Eu. As reaction ofhydrogenation to copper is limited by activation of hydrogen it is obvious that the maximalcontents of atomic hydrogen on a surface will correspond to the most active catalyst. From thedata of electronic microscopy follows that at modifying by europium the tendency to decreasein number of dense of large formations is marked. But substantial increase of dispersity doesnot occur. It can be proposed that the increase of the contents of atomic hydrogen at catalystsurfaces occurs due to strengthening of hydrogen spillover at Eu presence. High selectivity ofhydrogenation of acethylene bond on copper is connected to low heat of adsorption of olefinebond unfavourable for catalysis. The high yield of cis-olefinic compounds is provided byformation of dihydride complexes of copper type which enable to give the synchronousconnection of two atoms of hydrogen to triple bond (1 *) with formation of z, z-diolefine.5,17-docosadiene is attractant of gipsy moth which is pest of forest and fruit trees(Lymantria Dispair). At testing of synthesized attractant in gardens of Alatau forestry even atthe lowest number of harmful insects it was found out on 5-7 butterflies in traps. In case ofcarrying out of tests in Beltswill woods (USA) in traps with attractant it is found14-17 butterflies for two days and in traps with sexual pheromones (Lymantria Dispair) forthe same time 5-14 butterflies of a harmful insect are revealed. These data shows the highbiological activity of synthesized attractant.The financial support was provided by ISTC (beforehand grant of Project № K-255).References1. Yefremenko I.G., Zilberberg I.L., Zhidomirov G.M., Pak A.M. // Reac.Kinet.Catal.Lett., 1995,V.56, № 3, P.77-85451