Diaryliodonium as a double ?-hole donor: the dichotomy of thiocyanate halogen bonding provides divergent solid state arylation by diaryliodonium cations; Organic Chemistry Frontiers; Vol. 7, iss. 16
| Parent link: | Organic Chemistry Frontiers Vol. 7, iss. 16.— 2020.— [P. 2230-2242] |
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| Enti autori: | , |
| Altri autori: | , , , , , , , , |
| Riassunto: | Title screen X-ray crystallography data revealed the dichotomy of thiocyanate-involving noncovalent interactions in [Ar1Ar2I](SCN), as reflected in the generation of two types of supramolecular aggregates: (i) previously unreported 4-membered heterotetramers (Ar1/Ar2 = 4-ClC6H4/2,4,6-(MeO)3C6H2, 4-BrC6H4/2,4,6-(MeO)3C6H2; 2 examples) featuring exclusively halogen bond (XB) N-XB-bound SCN− anions, and (ii) the 8-membered cyclic heterotetramers (Ar1/Ar2 = Ph/Ph, Ph/2,4,6-(MeO)3C6H2, 4-FC6H4/2,4,6-(MeO)3C6H2, 3,5-Me2C6H3/4-MeOC6H4, 3,5-Me2C6H3/2,4,6-(MeO)3C6H2; 5 examples) with two N,S-XB-bound thiocyanates featuring both S⋯I and N⋯I noncovalent contacts. In all cases, the IIII centers function as a double σ-hole donor to provide two directional XBs. The XB preorganization affects the chemoselectivity of the thiocyanate arylation in the solid-state: the heating of [Ar1Ar2I](SCN) exhibiting either N-, or N,S preorganized XBs leads to extremely rare N-arylation or the conventional S-arylation, respectively. The charge-assisted XBs in [Ar1Ar2I](SCN) were studied using density functional theory (DFT) calculations combined with a molecular electrostatic potential surface analysis and the quantum theory of atoms in molecules (QTAIM). Competition between the N- and N,S-XB interactions was studied, including the recognition of energy differences between the I⋯N and I⋯S contacts. The computational data were useful to rationalize the divergent solid-state N- or S-arylation of thiocyanates. Режим доступа: по договору с организацией-держателем ресурса |
| Lingua: | inglese |
| Pubblicazione: |
2020
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| Soggetti: | |
| Accesso online: | https://doi.org/10.1039/D0QO00678E |
| Natura: | Elettronico Capitolo di libro |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663220 |
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| 200 | 1 | |a Diaryliodonium as a double ?-hole donor: the dichotomy of thiocyanate halogen bonding provides divergent solid state arylation by diaryliodonium cations |f N. S. Soldatova, P. S. Postnikov, V. V. Suslonov [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 330 | |a X-ray crystallography data revealed the dichotomy of thiocyanate-involving noncovalent interactions in [Ar1Ar2I](SCN), as reflected in the generation of two types of supramolecular aggregates: (i) previously unreported 4-membered heterotetramers (Ar1/Ar2 = 4-ClC6H4/2,4,6-(MeO)3C6H2, 4-BrC6H4/2,4,6-(MeO)3C6H2; 2 examples) featuring exclusively halogen bond (XB) N-XB-bound SCN− anions, and (ii) the 8-membered cyclic heterotetramers (Ar1/Ar2 = Ph/Ph, Ph/2,4,6-(MeO)3C6H2, 4-FC6H4/2,4,6-(MeO)3C6H2, 3,5-Me2C6H3/4-MeOC6H4, 3,5-Me2C6H3/2,4,6-(MeO)3C6H2; 5 examples) with two N,S-XB-bound thiocyanates featuring both S⋯I and N⋯I noncovalent contacts. In all cases, the IIII centers function as a double σ-hole donor to provide two directional XBs. The XB preorganization affects the chemoselectivity of the thiocyanate arylation in the solid-state: the heating of [Ar1Ar2I](SCN) exhibiting either N-, or N,S preorganized XBs leads to extremely rare N-arylation or the conventional S-arylation, respectively. The charge-assisted XBs in [Ar1Ar2I](SCN) were studied using density functional theory (DFT) calculations combined with a molecular electrostatic potential surface analysis and the quantum theory of atoms in molecules (QTAIM). Competition between the N- and N,S-XB interactions was studied, including the recognition of energy differences between the I⋯N and I⋯S contacts. The computational data were useful to rationalize the divergent solid-state N- or S-arylation of thiocyanates. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Organic Chemistry Frontiers | ||
| 463 | |t Vol. 7, iss. 16 |v [P. 2230-2242] |d 2020 | ||
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