Hexene-1 isomerization on NaNp/CpTiCl3/Al2O3SiO2 (Np-naphthenide; Cp-cyclopentadienyl) system.

NaNp/CpTiCl(3)/Al(2)O(3)SiO(2) (Cp=cyclopentadienyl; Np=napthenide anion) systems are new catalysts active in the C=C hexene-1 bond isomerization reaction. Their activity depends on amount of titanium[III] hydride surface complexes and the support Lewis acidity. As results showed, all these properties are a function of the Al(2)O(3)-SiO(2) gels composition.

Study on the NaNp/CpTiCl3/Al2O3-SiO2 system.

CpTiCl(3)/Al(2)O(3)-SiO(2)/NaNp (Cp=cyclopentadienyl, Np=naphthenide anion) system was obtained by a reduction of cyclopentadienyl titanium[IV] complexes supported on alumina-silica gels with sodium naphthenide in dinitrogen or argon atmospheres. The yield of the reduction reactions and the yield of dinitrogen fixation by the systems reduced in dinitrogen depend on the kind of phases which are present on alumina-silica gel surfaces according to their composition. On hydrolysis the nitrogen titanium complexes obtained liberated ammonia.

Study on the NaNp/Al2O3-SiO2 system.

Sodium naphthenide (NaNp) deposited on aluminosilicate gels yields systems that exhibit signals in EPR spectra, the multiplicity, g values, and intensities of which depend on the gel composition. The symmetrical singlets (I) of a g(1) value of 2.00 were assigned to the complexed naphthalene anion radicals on the centers occurring on the surfaces of the alumina and silica phases of the gels studied.