New 2-tetrahydrofurfuryloxotitanium(IV) intermediates for the synthesis of olefin polymerization catalysts
Abstract
The complexes
[TiCl
3
(tmen){η
1
-OCH
2
CH(CH
2
)
3
O}] 1,
[Ti
2
(µ-Cl)
2
Cl
4
{η
2
-OCH
2
CH(CH
2
)
3
O}
2
] 2 and [TiCl
4
(tmen)]
3
(tmen = Me
2
NCH
2
CH
2
NMe
2
) have been synthesized and structurally characterized by
X-ray diffraction. The crystals of 1 consist of monomeric
[TiCl
3
(tmen){η
1
-OCH
2
CH(CH
2
)
3
O}] molecules. Three chloride, one oxygen
and two nitrogen atoms form a distorted octahedron around the titanium
atom. Compound 2 has a dimeric structure. Each titanium atom is
surrounded by two bridging chloride atoms, two terminal chloride atoms
and two oxygen atoms of the 2-tetrahydrofurfuryloxide ligand. The
crystals of compound 3 consist of monomeric molecules in which
four terminal chloride atoms and two nitrogen atoms from the chelate
tmen ligand form a distorted octahedron around Ti. High catalytic
activity was found for 1 and 2.
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