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Kinetics of substitution at ternary titanium(IV)-cyclopentadienyl, pyronato or pyridinato-halide or alkoxide complexes (1993)

Burgess, John ; Parsons, Simon A

New York, NY [u.a.] : Wiley-Blackwell

Applied Organometallic Chemistry 7 (1993), S. 343-351

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Details

ISSN: 0268-2605

Schlagwort(e): Titanium(IV) complexes ; antitumour agents ; ligand substitution ; kinetics ; mechanism ; activation volume ; Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Rate laws and kinetic parameters are reported for substitution at titanium(IV) complexes Ti(LL)2X2, where LLH=cyclopentadiene, the 4-pyrone ethylmaltol, several 4-pyridinones, and related ligands, and X=halide or alkoxide, in acetonitrile solution at 298.2 K. Reactivities are discussed in terms of the nature of the leaving group, the entering group and the non-leaving ligand LL-. Activation volumes of -15 and -12 cm3 mol-1 have been determined for thiocyanate attack at Ti(cp)2Cl2 and Ti(etmalt)2Cl2 respectively. Substitution mechanisms are discussed in the light of the kinetic parameters obtained.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/aoc.590070508

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