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Volumn 7, Issue 3, 2001, Pages 591-599

Probing the reactivity of oxomanganese-salen complexes: An electrospray tandem mass spectrometric study of highly reactive intermediates

Author keywords

Density functional calculations; Epoxidations; Gas phase chemistry; Manganese; Mass spectrometry

Indexed keywords

LIGAND; MANGANESE DERIVATIVE; METAL COMPLEX; OXYGEN; SALEN; UNCLASSIFIED DRUG;

EID: 0035793305     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-3765(20010202)7:3<591::AID-CHEM591>3.0.CO;2-I     Document Type: Article
Times cited : (97)

References (83)
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    • A similar method that translates kinetic branching ratios into thermochemical data in cases when the difference in entropy change between two different fragmentation pathways can be neglected was introduced by Cooks. The assumptions inherent in the "Cooks' kinetic method" were essentially the same as those required for linear free energy relationships, that is, Hammett σρ correlations. The kinetic method has been widely used for the determination of proton affinities and gas-phase basicities of many organic compounds, and this has yielded values in excellent agreement with independent methods. a) R. G. Cooks, J. S. Patrick, T. Kotiaho, S. A. McLuckey, Mass Spectrom. Rev. 1994, 13, 287-339;
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    • The ground state of the manganese(III) complex is quintet. As for the ground state of the manganese(V) oxo complex, calculations on salen model systems point to triplet ground states: a) T. Strassner, K. N. Houk, Org. Lett. 1999, 1, 419-421;
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    • Angew. Chem. Int. Ed. 2000, 39, 589-592. Preliminary calculations in our group on the singlet states of oxomanganese(V)-salen show them very close in energy to the triplets. In view of the above cited model studies, we decided to use the triplet energies for the homodesmotic reaction.
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    • note
    • In our ESMS experiments, we have always used a combination of amine N-oxides and iodosobenzene in order to get higher yields of the μ-oxomanganese(IV) complexes and better reproducibility of the oxidized species than would be possible with N-oxides as the only oxygen source.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.