Wydział Chemii

Dorota Wiśniewska

Zofia Janas

Piotr Sobota

Lucjan B. Jerzykiewicz

2006

Organometallics

25

6166-6169

10.1021/om0608051

Naukowa

Angielski

Artykuł

Complexes having two ancillary (tbop)^2- ligands where tbopH₂ = 2,2‘-thiobis{4-(1,1,3,3-tetramethylbutyl)phenol}, viz., [M(tbop-κ³O,S,O)₂] (M = Ti, 1; M = Zr, 2; M = Hf, 3), have been prepared in good yields by amine or HCl elimination from tbopH₂. The ¹H and ¹³C NMR studies showed that complexes 1−3 adopt in solution mononuclear structures. Treatment of 1−3 with 2 equiv or an excess of AlMe₃ generates heterometallic [M(μ-tbop-κ³O,S,O)₂Me₂(μ-AlMe₂)₂] (M = Ti, 4; M = Zr, 5; M = Hf, 6) complexes. The structures of 4−6 were confirmed by NMR spectroscopy; complexes 5 and 6 were further investigated by X-ray crystallography. These studies showed 4−6 to be trimers either in the solid state or in solution. The crystals of 5·CH₂Cl₂ and 6·CH₂Cl₂ consist of eight-coordinate dimethyl Zr or Hf centers and two AlMe₂ moieties attached to oxygen atoms of the tbop ligands. The saturated coordination sphere of the metal centers in 1−6 makes them inactive in ethene polymerization

Catalysts, Alkyls, Metals, Ligands, Aluminum

https://doi.org/10.1021/om0608051

https://www.acs.org/content/acs/en.html