Unusual Formation of Two New Titanium(IV) Tetraphenolates

作者：Knizek Joerg; Noeth Heinrich

来源：Zeitschrift Fur Naturforschung Section B-a Journal of Chemical Sciences, 2011, 66(1): 58-64.

DOI：10.5560/znb.2011.66b0058

• Tetrakis(2,4-di-tert.-butyl-phenolato)titanium(I V)
• Dimeric[Tris(pentafluorophenolato)(2,6-diisopropylphenolato)titanium(IV)
• X-Ray Structures

When the product of the reaction of 2,6-di-tert.-butylphenol with TiCl(4) in a 3:1 ratio is treated with Na[HBEt(3)], the isolated product is not (2,6-tert.-Bu(2)C(6)H(3)O)(3)Ti(HBEt(3)) but the isomerized ester (2,4-tert.-Bu(2)C(6)H(3)O)(4)Ti with molecular S(4) symmetry. This rearrangement of the R substituents does not occur upon reacting 2,6-diisopropylphenol with TiCl(4) and Na[HBEt(3)]. An unexpected result is also observed for the product of the reaction of tris(2,6-diisopropylphenolato)titanium(IV) chloride with lithium bis(pentafluorophenolato)dihydridoborate. The isolated product proved to be dimeric tris(pentafluorophenolato)(2,6-diisopropylphenolato)titanium(IV) with two bridging pentafluorophenolato groups generating pentacoordinated Ti atoms.

• 出版日期2011-1