104181-55-7Relevant articles and documents
Reaction courses for formation of early transition metal phenoxides
Yasuda, Hajime,Nakayama, Yuushou,Takei, Kazuo,Nakamura, Akira,Kai, Yasushi,Kanehisa, Nobuko
, p. 105 - 116 (2007/10/02)
The 1 : 1 and 1 : 2 reactions of TiCl4 with Me3SiO-2,6-(CH3)2C6H3 produced TiCl32(THF)2 (1) and TiCl22(THF)2 (2), respectively, bearing six-coordinated geometry around Ti.The compound 2 assumes the cis-geometry regarding the two phenoxy groups and THF is coordinated in the trans position of the phenoxy groups.Similarly, the 1 : 1 and 1 : 2 reactions of NbCl5 with the trimethylsilylphenyl ether provided NbCl42(THF) (7) and NbCl32(THF) (8), respectively, with octahedron structure.The THF molecule again locates in the trans position of a phenoxy group in both cases and the two phenoxy groups of 8 locate in the cis position.Tungsten mono-phenoxide, WCl52 (12), also has octahedron structure.In cases of tungsten bis-phenoxides, WCl42 (13) and WCl42 (14), the former has trans structure while the latter has cis structure regarding the phenoxy groups.A unique square pyramidal geometry has been observed in the tetrakis(phenoxy) tungsten, WCl4 (16).Key words: Titanium; Niobium; Tungsten; Zirconium; Tantalum
Bulky Metal Aryloxides, Arylamides, and Sulphur and Phosphorus Analogues Part 1. Synthetic and Chemical Studies of Titanium and Zirconium Aryloxides
Duff, Alan W.,Kamarudin, Rose A.,Lappert, Michael F.,Norton, Reginald J.
, p. 489 - 498 (2007/10/02)
The synthesis and characterisation of several classes of aryloxides (OR) of TiIV, TiIII, ZrIV, and Li are described.Those of TiIV are of eight distinct classes: , , , , , , , and (R' = alkyl, thf = tetrahydrofuran); the TiIII complexes are of types n> and ; the ZrIV complexes are of seven types: and , with X = OR, Cl, NMe2, OMe, OC(O)NMe2, or N(Ph)CNMe2; the new lithium aryloxides have formula n.Most of the results relate to the ligands 2,6-Me2C6H3O-, 2,6-Pri2C6H3O-, 2,6-But2C6H3O-, 4-Me-2,6-But2C6H2O-, 2,4,6-But3C6H2O-, 3,5-ButC6H3O-, and 2,4-But2C6H3O-.The new complexes are readily soluble in diethyl ether and many also in hydrocarbons.Synthetic procedures include the following systems: (i) LiBun-ROH-OEt2, for Li aryloxides; (ii) TiIV, TiIII, or ZrIV chlorides with n; (iii) for TiIII, a redox reaction of type (ii) using a TiIV chloride as precursor; (iv) a TiIV or ZrIV dimethylamide and ROH; and (v) for the ZrIV carbamate or ZrIV urea, a CO2 or PhNCO insertion into the appropriate ZrIV dimethylamide.