van der Waals Volumes and Radii

Bondì, A.

doi:10.1021/j100785a001

Cited by 18,887 publications

(14,742 citation statements)

References 2 publications

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“…1). The hexametallic compound has S-C-S bond angles of 123.9(5)° and 124.6(5)°, the smallest of which is significantly smaller than those of 125.0 (7) 10 and indicate a significant metal-metal interaction. 3 The view along the gold-gold interactions reveals a "crossed swords" arrangement of the P-Au-S linkages, which is a common feature in previously reported gold(I) complexes.…”

Section: Gold Complexesmentioning

confidence: 94%

Multimetallic Arrays: Bi-, Tri-, Tetra-, and Hexametallic Complexes Based on Gold(I) and Gold(III) and the Surface Functionalization of Gold Nanoparticles with Transition Metals

et al. 2009

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Section: Gold Complexesmentioning

confidence: 94%

Multimetallic Arrays: Bi-, Tri-, Tetra-, and Hexametallic Complexes Based on Gold(I) and Gold(III) and the Surface Functionalization of Gold Nanoparticles with Transition Metals

et al. 2009

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“…The value of ,min is an input parameter in our approach. Here, the assumed parameter range is ,min = 0.16 to 0.3 nm, similar to the lengths scale of one to two covalent carbon-carbon bonds or van der Waals radii of carbon and oxygen atoms 79 .…”

Section: Modelling Approach For Effective Surface Tensionmentioning

confidence: 99%

Surface tension prevails over solute effect in organic-influenced cloud droplet activation

Ovadnevaitė

Zuend

Laaksonen

et al. 2017

Nature

282

373

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“…The additional electrostatic repulsion acting between the positively charged cationic tellurium centers enhances the steric strain within the periregion and leads to a greater deformation of the acenaphthene carbon framework. 35 The conformation of dication 14 can be classified as type CCCc-C ( Figure 9, Table 3). The two Te-C Me bonds are displaced 151.14(1)° and 136.01(1)° from the respective C(10)-C(1)-Te-C Me planes, locating the methyl groups at positions in between an equatorial and axial configuration, corresponding to a twist conformation.…”

Section: Introductionmentioning

confidence: 99%

“…Counterintuitively 35 ]. This appears to be correlated to the contrasting conformation of the cis and trans B-AA type systems in 8-13 and the B-A configuration prevalent for compounds 5-7.…”

Section: Introductionmentioning

confidence: 99%

Noncovalent Interactions in Peri-Substituted Chalconium Acenaphthene and Naphthalene Salts: A Combined Experimental, Crystallographic, Computational, and Solid-State NMR Study

et al. 2012

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ABSTRACT:Twelve related monocation chalconium salts [{Nap(EPh)(E`Ph)Me} + {CF 3 SO 3 } -] 2-4, [{Acenap(Br)(EPh)Me}{CF 3 SO 3 } -] 5-7 and [{Acenap(EPh)(E`Ph)Me} + {CF 3 SO 3 } -] 8-13, have been prepared and structurally characterized. For their synthesis naphthalene compounds [Nap(EPh)(E`Ph)] (Nap = naphthalene-1,8-diyl; E/E` = S, Se, Te) N2-N4 and associated acenaphthene derivatives [Acenap(EPh)(E`Ph)] (Acenap = acenaphthene-5,6-diyl; E/E` = S, Se, Te) A5-A13 were independently treated with a single molar equivalent of methyl trifluoromethanesulfonate [MeOTf]. In addition, reaction of bistellurium compound A10 with two equivalents of MeOTf afforded the doubly methylated dication salt [{Acenap(TePhMe) 2 } 2+ {(CF 3 SO 3 ) 2 } 2-}] 14. Distortion of the rigid naphthalene and acenaphthene backbone away from the ideal was investigated in each case and correlated in general with the steric bulk of the interacting atoms located at the proximal peripositions. Naturally, introduction of the ethane linker in acenaphthene compounds increased the splay of the bay region compared with equivalent naphthalene derivatives resulting in greater peri-distances. The conformation of the aromatic rings and subsequent location of p-type lone-pairs has a significant impact on the geometry of the peri-region, with anomalies in periseparations correlated to the ability of the frontier orbitals to take part in attractive or repulsive interactions. In all but one of the monocations a quasi-linear three-body C Me -E···Z (E = Te, Se, S; Z = Br/E) fragment provides an attractive component for the E···Z interaction. Density-functional studies have confirmed these interactions and suggested the onset of formation of threecenter, four-electron bonding under appropriate geometric conditions, becoming more prevalent as heavier congeners are introduced along the series. The increasingly large J values for Se-Se, Te-Se and Te-Te coupling observed in the 77 Se and 125 Te NMR spectra for 1, 3, 4, 9, 10 and 13 give further evidence for the existence of a weakly-attractive through-space interaction. INTRODUCTIONUnderstanding the nature of atomic interactions and the strength of chemical bonds is an integral feature underpinning all aspects of chemistry, biology and materials science and as such has always attracted great attention. Pioneering work on the electronic theory of the covalent bond led to a greater understanding of strong bonding (covalent/ionic), 1 but ambiguity over the role of weak inter-and intra-molecular non-covalent interactions continues to intrigue chemists. 2-4 Designing structural architectures which invoke novel and unusual bonding interactions is indispensable for developing the theory of nonbonded forces and the chemical bond and is therefore an intriguing field of study. 5,6 Non-covalent interactions can be attractive or repulsive in nature and are continually being highlighted within a diverse

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van der Waals Volumes and Radii

Cited by 18,887 publications

References 2 publications

Multimetallic Arrays: Bi-, Tri-, Tetra-, and Hexametallic Complexes Based on Gold(I) and Gold(III) and the Surface Functionalization of Gold Nanoparticles with Transition Metals

Multimetallic Arrays: Bi-, Tri-, Tetra-, and Hexametallic Complexes Based on Gold(I) and Gold(III) and the Surface Functionalization of Gold Nanoparticles with Transition Metals

Surface tension prevails over solute effect in organic-influenced cloud droplet activation

Noncovalent Interactions in Peri-Substituted Chalconium Acenaphthene and Naphthalene Salts: A Combined Experimental, Crystallographic, Computational, and Solid-State NMR Study

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