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Volumn 20, Issue 23, 2001, Pages 4887-4895

Electronic effects on the stability of isomeric alkyl transition metal compounds

Author keywords

[No Author keywords available]

Indexed keywords

CARBANIONIC CHARACTER; DIMETHYLAMINO DITHICYANATO PALLADIUM COMPLEXES; ELECTRONIC EFFECTS; ISOMERIC ALKYL TRANSITION METAL COMPOUNDS; METAL CARBON BOND;

EID: 0035851938     PISSN: 02767333     EISSN: None     Source Type: Journal    
DOI: 10.1021/om0105775     Document Type: Article
Times cited : (58)

References (71)
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    • (2000) Chem. Rev. , vol.100 , pp. 351
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    • (b) Computational Organometallic Chemistry; Cundari T. R., Ed.; Marcel Dekker: New York, 2001.
    • (2001) Computational Organometallic Chemistry
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    • (1991) Jaguar 4.0
  • 37
    • 0041464227 scopus 로고    scopus 로고
    • For a discussion of the application of natural bonding orbital methods to transition metal compounds, see: Frenking, G.; Fröhlich, N
    • For a discussion of the application of natural bonding orbital methods to transition metal compounds, see: Frenking, G.; Fröhlich, N. Chem. Rev. 2000, 100, 717-774.
    • (2000) Chem. Rev. , vol.100 , pp. 717-774
  • 38
    • 0011462506 scopus 로고    scopus 로고
    • note
    • The position of the equilibrium in hypothetical isomerization reactions would of course depend on the relative free energies instead of electronic energies. However, the zero-point energy, internal vibrational energy, and entropy effects can be assumed to be rather small and should mostly cancel out in these isodesmic reactions.
  • 41
    • 0000164566 scopus 로고
    • note
    • Note that "bare" transition metal-alkyl compounds, in which the metal atom bears no or few ligands, and which are therefore very similar to the alkyllithiums, can be made in the gas phase. There is much indirect evidence that the preference for primary positions is found here too. This has been established in at least one case by computation: Perry, J. K.; Goddard, W. A., III. J. Am. Chem. Soc. 1994, 116, 5013-5014.
    • (1994) J. Am. Chem. Soc. , vol.116 , pp. 5013-5014
    • Perry, J.K.1    Goddard W.A. III2
  • 55
    • 4143146214 scopus 로고
    • For reviews on computational studies of homogeneous polymerization catalysis, see ref 12: (a) Koga, N.; Morokuma, K. Chem. Rev. 1991, 91, 823-842.
    • (1991) Chem. Rev. , vol.91 , pp. 823-842
    • Koga, N.1    Morokuma, K.2
  • 64
    • 0000009069 scopus 로고    scopus 로고
    • note
    • For a study of the stabilizing effect of electron-withdrawing α-nitrile groups on some different alkyl-palladium(II) compounds, see: Sakaki, S.; Biswas, B.; Sugimoto, M. Organometallics 1998, 17, 1278-1289.
    • (1998) Organometallics , vol.17 , pp. 1278-1289
    • Sakaki, S.1    Biswas, B.2    Sugimoto, M.3
  • 65
    • 0011418687 scopus 로고    scopus 로고
    • note
    • It should be pointed out that the nickel complexes are actually better polymerization catalysts. However, the very careful equilibria study of ref 13 has only been carried out for the palladium derivatives.
  • 71
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    • note
    • This conclusion is slightly at variance with that in ref 15, in which results similar to ours are obtained using the BP86 functional for the same "small" and "large" versions of these palladium n-and isopropyl complexes. In that study, the difference in energy favoring the isopropyl isomer is found to be slightly larger in the large system than in the small one (2.65 vs 1.96 kcal/mol), and the authors attribute this to steric effects. In any case, the small energy changes involved are not relevant here.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.