Cyanamides as π-Hole Donor Components of Structure-Directing (Cyanamide)···Arene Noncovalent Interactions

Yulia N. Toikka, Alexander S. Mikherdov, Daniil M. Ivanov, Tiddo J. Mooibroek, Nadezhda A. Bokach, Vadim Yu Kukushkin

Research outputpeer-review

4 Citations (Scopus)


Crystallization of newly prepared copper(II) clusters [Cu4X6O(NCNMe2)4] (X = Cl 1 or Br 2) from toluene and styrene solutions afforded crystalline adducts 1·4PhMe, 1·4PhCH-CH2, 2·4PhMe, and 2·4PhCH-CH2, which were characterized by physicochemical methods including single-crystal X-ray diffraction. Inspection of the X-ray structures of (1-2)·4(arene) and the appropriate Hirshfeld molecular surface analysis allowed the recognition of the previously unreported π-hole···arene interactions involving the cyanamide ligands. The presence of these interactions and their structure-directing character was confirmed theoretically by density functional theory calculations including molecular electrostatic potential, energy decomposition, and atoms-in-molecules analyses. The observed π-hole···πinteraction between coordinated cyanamide and arene moieties in the adducts exhibits a contribution of π-hole···σ(C-Haryl) interaction. Analysis of the Cambridge Structure Database revealed that the cyanamide···arene separations in the [Cu4X6O(NCNMe2)4]·4(arene) systems are among the shortest found for all reported cyanamide structures.

Original languageEnglish
Pages (from-to)4783-4793
Number of pages11
JournalCrystal Growth and Design
Issue number7
Publication statusPublished - 1 Jul 2020

Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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