By R. J. H. Clark, D. C. Bradley and P. Thornton (Auth.)
Read or Download The Chemistry of Titanium, Zirconium and Hafnium. Pergamon Texts in Inorganic Chemistry PDF
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Additional resources for The Chemistry of Titanium, Zirconium and Hafnium. Pergamon Texts in Inorganic Chemistry
Example text
This was the first correct assignment of a hgand field band of a transition metal complex, and laid the basis for the further under standing of other such optical spectra. The band maxima for all titanium(III) complexes in which there are six equivalent ligands, together with their extinction coefficients, are g i v e n i 4 2 in Table 27. Two features of Table 27 are of general interest. Firstly, the energy of the ^Eg^'^-Tzg transition for a given complex ion gives a direct measure of the strength o( the ligand field.
G. by insertion of oxygen in the T i - C bond to form MeOTiCls. Methyltitanium tribromide, ethyltitanium trichloride and i-butyltitanium trichloride are also known, and have similar properties. Dimethyltítaniam Dichloride This compound is formedii» during the dropwise addition of trimethylaluminium in hexane to titanium tetrachloride (2:1 mole ratio), also in hexane, at — 80°C. The reaction mixture is allowed to warm to room temperature and then recooled to — 80°C. Black crystals of MeaTiCk thereby separate o u t ; this compound is less stable than MeTiCb.
They are soluble in water, but slowly decompose to the corresponding alcohol, alkyl haUde and hydrated titanium dioxide. The compounds are generally prepared by direct reaction between the parent tetraalkoxide and the appropriate molar proportion of the tetrahalide in an inert solvent such as benzene. g. the correct formulation of the n-butoxy chlorides is [TiCl(OBu)3]3, r r i C l 2 ( O B u ) 2 ] 2 and [ T i C l 3 ( O B u ) ] . Diphenoxytitanium dichloride is a monomer in benzene, but in the solid state it is an alkoxy-bridged dimer.