ISSN:
1572-901X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary The i.r. spectra of the crystalline complexes, Cp2TiH2AlX(X′) · L (X and X′ = H or Hal; L = Et2O or NEt3) have been studied. Crystallization from solutions containing monomers Cp2TiH2AlClH · Et2O (prepared at −70°), Cp2TiH2AlHCl · NEt3, and Cp2TiH2AlHBr · Et2O results in splitting off of 0.5 L and formation of structures containing ordinary and double H bridges, terminal H atoms, and nonequivalent Ti and Al atoms. The Cp2TiH2AlClH · 0.5 Et2O complex prepared at 20° is a dimer both in solution and in the crystalline state. It contains two types of H-bridges, Ti-H-Al and Ti-H2-Al, and equivalent Ti and Al atoms. The Cp2TiH2AlCl2 · Et2O compound is, seemingly, a dimer containing ordinary H-bridges, whereas Cp2TiH2AlCl2 · NEt3 crystallizes as a monomer with double H-bridges owing to the higher basicity of triethylamine compared with ether.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00618234
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