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0003718311
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Huzinaga, S.1
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85037315641
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note
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-1 for the silicenium ion are, however, consistent and comparatively small.
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28
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0004343508
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0000615410
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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;
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85037304097
-
-
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.
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37
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0010922186
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a) Gaussian94 (RevisionD.4), M. J. Frisch, G. W. Trucks, H. B. Schlegel, P. M. W. Gill, B. G. Johnson, M. A. Robb, J. R. Cheeseman, T. Keith, G. A. Petersson, J. A. Montgomery, K. Raghavachari, M. A. Al-Laham, V. G. Zakrzewski, J. V. Ortiz, J. B. Foresman, J. Cioslowski, B. B. Stefanov, A. Nanayakkara, M. Challacombe, C. Y. Peng, P. Y. Avala, W. Chen, M. W. Wong, J. L. Andres, E. S. Replogle, R. Gomperts, R. L. Martin, D. J. Fox, J. S. Binkley, D. J. Defrees, J. Baker, J. P. Stewart, M. Head-Gordon, C. Gonzalez, J. A. Pople, Gaussian, Inc., Pittsburgh, PA, 1995;
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Al-Laham, M.A.12
Zakrzewski, V.G.13
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Foresman, J.B.15
Cioslowski, J.16
Stefanov, B.B.17
Nanayakkara, A.18
Challacombe, M.19
Peng, C.Y.20
Avala, P.Y.21
Chen, W.22
Wong, M.W.23
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Replogle, E.S.25
Gomperts, R.26
Martin, R.L.27
Fox, D.J.28
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Defrees, D.J.30
Baker, J.31
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Pople, J.A.35
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Frisch, M.J.1
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Komaromi, I.40
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Martin, R.L.42
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Gonzalez, C.48
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Andres, J.L.54
Head-Gordon, M.55
Replogle, E.S.56
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more..
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39
-
-
85037296335
-
-
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
-
-
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.
-
-
-
-
41
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0001448271
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P. Schwerdtfeger, L. Laakkonen, P. Pyykkö, J. Chem. Phys. 1992, 96, 6807.
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33845283002
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M. W. Schmidt, P. N. Truong, M. S. Gordon, J. Am. Chem. Soc. 1987, 109, 5217.
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-
43
-
-
85037308536
-
-
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
-
-
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
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