Titanocene(III) complexes with 2-phosphinoaryloxide ligands for the catalytic dehydrogenation of dimethylamine borane

Klahn Marcus; Hollmann Dirk; Spannenberg AnkeBrueckner AngelikaBeweries Torsten

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Titanocene(III) complexes with 2-phosphinoaryloxide ligands for the catalytic dehydrogenation of dimethylamine borane

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A study of the dehydrogenation of dimethylamine borane using different titanocene(III) complexes with 2-phosphinoaryloxide ligands is presented. Complexes Cp2Ti(kappa(2)-O, P-O-C6H4-PR2) (3a: R = i-Pr, 3b: R = Ph) (Cp = eta(5)-cyclopentadienyl) and Cp*Ti-2(kappa(1)-O-O-C6H4-PR2) (5a: R = i-Pr, 5b: R = Ph) (Cp* = eta(5)-penta-methylcyclopentadienyl) were prepared by reactions of the 2-phosphinophenol ligand with different titanocene sources and fully characterised. Their catalytic activity depends on the steric influence of the cyclopentadienyl ligand, the coordination mode of the 2-phosphinoaryloxide ligand and on the used solvent. Complex 3a showed a turnover number of 43.2 in the neat substrate after 24 hours. EPR investigations were used to elucidate the fate of the Ti(III) catalyst.

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《Dalton transactions: An international journal of inorganic chemistry》 |2015年第27期|12103-12111|共9页
作者
Klahn Marcus; Hollmann Dirk; Spannenberg AnkeBrueckner AngelikaBeweries Torsten;
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Univ Rostock, Leibniz Inst Katalyse eV, D-18059 Rostock, Germany;

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正文语种英语
中图分类化学;无机化学;
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Titanocene(III) complexes with 2-phosphinoaryloxide ligands for the catalytic dehydrogenation of dimethylamine borane

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