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Volumn 62, Issue 2, 2007, Pages 235-243

The sum of van der Waals radii - A pitfall in the search for bonding

Author keywords

Interactions; Limits of precision; Polarized covalent bonds; Supramolecular aggregates; Van der waals radii; Weak attractive

Indexed keywords

BEAM PLASMA INTERACTIONS; CHEMICAL BONDS;

EID: 35649021690     PISSN: 09320776     EISSN: None     Source Type: Journal    
DOI: 10.1515/znb-2007-0215     Document Type: Article
Times cited : (50)

References (62)
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    • b) The covalent vs. ionic character of Co/Mn-S bonds has recently been investigated by experimental and computational methods and a high degree of σ-type covalency found: D. Maganas, S. S. Staniland, A. Grigoropoulos, F. White, S. Parsons, N. Robertson, P. Kyritsis, G. Pneumatikakis, Dalton Trans. 2006, 2301.
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    • The figures for r(vdW)[H] and Σr(VdW)[Cl] given by Bondi [7], Huheey [9], Cotton et al. [10], and Batsanov [8] yield a range of Er(vdW)[H, Cl] = 280-320 pm, the data of Cotton et al. [10] (r(vdW)[Cl] = 180 pm, the lower limit of r(vdW)[H], 110 pm) Er(vdW)[H, Cl] = 290 pm, in conformity with the experimental figure of 1.
    • The figures for r(vdW)[H] and Σr(VdW)[Cl] given by Bondi [7], Huheey [9], Cotton et al. [10], and Batsanov [8] yield a range of Er(vdW)[H, Cl] = 280-320 pm, the data of Cotton et al. [10] (r(vdW)[Cl] = 180 pm, the lower limit of r(vdW)[H], 110 pm) Er(vdW)[H, Cl] = 290 pm, in conformity with the experimental figure of 1.
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    • The main reason for the increase is not the larger angle C-C-C, but the shorter C-H bond in conjunction with the longer C-Cl bond. d(H ⋯ Cl) = ca. 200 pm is still an expression of uncomfortable steric repulsion which the molecule attenuates by adopting a conformation in which d(H ⋯Cl) is close to Σr(vdW)[H, Cl].
    • The main reason for the increase is not the larger angle C-C-C, but the shorter C-H bond in conjunction with the longer C-Cl bond. d(H ⋯ Cl) = ca. 200 pm is still an expression of uncomfortable steric repulsion which the molecule attenuates by adopting a conformation in which d(H ⋯Cl) is close to Σr(vdW)[H, Cl].
  • 53
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    • Referring to Bondi [7], the authors used Σr(vdW)[N, P] = 340 pm [32]. The discrepancy of +1.5 % is well within the limits of precision.
    • Referring to Bondi [7], the authors used Σr(vdW)[N, P] = 340 pm [32]. The discrepancy of +1.5 % is well within the limits of precision.
  • 54
    • 35649018012 scopus 로고    scopus 로고
    • According to Pauling's procedure, 5, pp. 65-66, a unit positive charge enhances the electronegativities of P/As from 2.1/2.0 to ca. 2.4/2.3. Thus, the polarity of P/As-C(Ph) bonds is decreased so that the impact of the latter upon the charge at P/As may be disregarded
    • According to Pauling's procedure ([5], pp. 65-66), a unit positive charge enhances the electronegativities of P/As from 2.1/2.0 to ca. 2.4/2.3. Thus, the polarity of P/As-C(Ph) bonds is decreased so that the impact of the latter upon the charge at P/As may be disregarded.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.