Abstract
By decomposition of the complex [(η 5-C 5H 5) 2TiH 2AlH 2] 2 · TMEDA in toluene, the complex [(η 5-C 5H 5) 2Ti(μ-H) 2Al(μ,-H)(η 1 : η 5-C 5H 4)Ti(η 5-C 5H 5)(μ-H)] 2 · C 6H 5CH 3 was obtained. It crystallized in a monoclinic lattice with the unit cell parameters a 11.753(5); b 15.701(7); c 23.95(1) Å, β 99.24(4)°, space group P2 1/ c, V 4363 Å 3, Z = 4, ϱ calcd 1.32 g/cm 3. The compound proved to be polycyclic. Two four-membered ▪, two six-membered Ti(μ-C 5H 4)Al(μ-H)Ti(μ-H ) and one eight-membered Ti(μ-H)Ti(μ-H)Al(μ-H)Al(μ-H ) cycles can be distinguished in its structure. All hydride hydrogens are the bridging atoms. The titanium atom framework represents two almost regular isosceles triangles, while taking into account the aluminium atoms produces a gull-like figure with the “gull wings” being linked with the bridging hydrogen atom. Feasible pathways for the formation of this compound are discussed. The complex was shown not to promote the hydrogenation reaction of 1-hexene in a hydrocarbon medium, whereas in THF medium the hydrogenation rate amounted to 8 mol H 2/g-atom Ti · min after a certain induction period.
Published Version
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