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Volumn 7, Issue 13, 2001, Pages 2834-2841

π-donation and stabilizing effects of pnicogens in carbenium and silicenium ions: A theoretical study of [C(XH2)3]+ and [Si(XH2)3]+ (X=N, P, As, Sb, Bi)

Author keywords

Ab initio calculations; Carbenium ions; Pi interactions; Pnicogens; Silicenium ions

Indexed keywords

ATOMS; QUANTUM THEORY;

EID: 0035796419     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-3765(20010702)7:13<2834::AID-CHEM2834>3.0.CO;2-E     Document Type: Article
Times cited : (11)

References (46)
  • 24
    • 0003718311 scopus 로고
    • Elsevier, Amsterdam
    • In our modified (31/31/1) contraction scheme, we used an additional d-type polarization function taken from: S. Huzinaga, Gaussian Basis Sets for Molecular Calculation, Elsevier, Amsterdam, 1984.
    • (1984) Gaussian Basis Sets for Molecular Calculation
    • Huzinaga, S.1
  • 25
    • 85037315641 scopus 로고    scopus 로고
    • note
    • -1 for the silicenium ion are, however, consistent and comparatively small.
  • 32
    • 0000615410 scopus 로고
    • In the present study, we only considered the first steps of the NBO analysis, which led to the NAOs (Natural Atomic Orbital) and their occupations. Since the investigated cations show strongly delocalized bonds, that is, Y-conjugation, severe misinterpretations occur at any stage beyond the determination of the NAOs, and the concept of hybridization collapses. For details refer to: a) W. Kutzelnigg, Angew. Chem. 1984, 96, 262;
    • (1984) Angew. Chem. , vol.96 , pp. 262
    • Kutzelnigg, W.1
  • 36
    • 85037304097 scopus 로고    scopus 로고
    • note
    • The p(π)-populations in the p-NAOs perpendicular to the molecular plane are based on the population of both valence and Rydberg orbitals.
  • 39
    • 85037296335 scopus 로고    scopus 로고
    • note
    • +. All of these energies were obtained at the MP2/6-31G(d)//MP2/6-31G(d) level of theory and include ZPE corrections.
  • 40
    • 85037295278 scopus 로고    scopus 로고
    • note
    • +. For the sake of clarity and as a result of limited space, we do, however, not include this discussion in the main text. Details about these studies and further information are available from the authors.
  • 43
    • 85037308536 scopus 로고    scopus 로고
    • note
    • Compared with the fully planar structures, the structures that represent local minima prevent a proper NBO analysis as a result of the indistinguishability of σ- and π-charges. The discussion in the text therefore only focuses on the natural charge of the center atom A and the substituents X, although the existing conjugative interaction can still be detected as the occupation of the formally empty p orbital on C and Si.
  • 44
    • 85037303358 scopus 로고    scopus 로고
    • unpublished results
    • +X=O-Te are based on the the MP2/LANL1DZ+P′ level of theory, where LANL1DZ+P′ denotes the use of effective core potentials in conjunction with double-ζ type valence electron basis sets as described by Hay and Wadt:
    • Grützmacher, H.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.