2015
DOI: 10.1039/c5ce00365b
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The iodine–oxygen halogen bond: solid-state structures of 3-iodopropiolamides

Abstract: The solid-state structures of six 3-iodopropiolamides (I-CC-CO-NR 2 ; NR 2 = pyrrolidino, 2,5-dihydro-1Hpyrrolo, piperidino, morpholino, methylamino, amino) have been determined by XRD analysis. All but the parent 3-iodopropiolamide exhibit very short intermolecular iodine-oxygen contacts IJ2.754IJ2)-2.858IJ5) Å) leading to one-dimensional polymeric chains in the solid state. The shape of these chains and the packing arrangement depend on the size and ring conformation in the cases of cyclic tertiary amides (NR … Show more

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Cited by 10 publications
(5 citation statements)
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References 67 publications
(79 reference statements)
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“…The iodine-oxygen distance is 2.55 Å and shorter than the sum of the van der Waals radii, which are the shortest C-I•••O contacts reported so far. [11][12][13] In agreement with the very short For better understanding and visualizing the bonding feature in the complexes, the 3D deformation electron density maps were showed in Figure S8. These maps clearly show the nonspherical distribution of electron density around the halogen (X) atom.…”
Section: Computational Simulationsupporting
confidence: 76%
“…The iodine-oxygen distance is 2.55 Å and shorter than the sum of the van der Waals radii, which are the shortest C-I•••O contacts reported so far. [11][12][13] In agreement with the very short For better understanding and visualizing the bonding feature in the complexes, the 3D deformation electron density maps were showed in Figure S8. These maps clearly show the nonspherical distribution of electron density around the halogen (X) atom.…”
Section: Computational Simulationsupporting
confidence: 76%
“…An analysis of the remaining 122 data sets shows that in most cases I···O interactions are not present due to the formation of halogen bonds with other halogen bond acceptors, while the oxygen atom participates in hydrogen bond formation. Several examples of such behavior are cocrystals of morpholine with β-iodophenylacetylene (refcodes MORIPA and MORIPA01); , morpholine and 1,3-diiodotetrafluorobenzene (refcode WIGQUB), where only I···N halogen bonds are formed; and the reported structure of 3-iodo-1-(morpholin-4-yl)­prop-2-yn-1-one (refcode LUNLAJ), where the I···O halogen bond is formed with the ketone oxygen atom. From the 21 bromine-based data sets, only 2 correspond to systems where the donor and acceptor atoms are on different components; those are the cocrystal between morpholine and 1,4-dibromotetrafluorobenzene (refcode DIVDIW) and the 4,4-diethylmorpholinium salt of 2,5-dibromo-7,7,8,8-tetracyanoquinodimethane (refcode BOTGOG) .…”
mentioning
confidence: 99%
“…Although the arrangement of diynes in the present article stands no chance of undergoing topochemical polymerization, we suggest that in other systems prone to polymerization, replacing Br, I or H atoms by Cl atoms in their diyne groups might result in successful PolyChloroDiAcetylene (PCDA) formation as well. This work also contributes to an emerging research theme, namely the concept of orthogonal molecular interactions such as HBs and XBs (Kratzer et al, 2015;Takemura et al, 2014;Voth et al, 2009), which may find applications in medicinal chemistry and chemical biology (Wilcken et al, 2013).…”
Section: Chemical Contextmentioning
confidence: 95%