What is it about?

By employing electrospray ionization mass spectrometry, it was proven experimentally that the [6]helicene–Ag+ complex (i.e., [Ag(C26H16)]+) exists in the gas phase. Further, applying quantum mechanical DFT calculations, the most probable structure of this cationic complex [Ag(C26H16)]+ was derived. Finally, in the solid state, the complex [6]helicene–silver triflate–monohydrate (i.e., C26H16–AgCF3SO3–H2O), crystallizing in the monoclinic system with the centro-symmetric P21/c space group, was prepared and analyzed. The characteristic feature of this complex packing in the solid state is the formation of the separated [6]helicene and silver triflate domains. In both of these binding modes, the investigated [6]helicene ligand functions as a molecular tweezer for the univalent silver cation.

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Why is it important?

By employing electrospray ionization mass spectrometry, it was proven experimentally that the [6]helicene–Ag+ complex (i.e., [Ag(C26H16)]+) exists in the gas phase. Further, applying quantum mechanical DFT calculations, the most probable structure of this cationic complex [Ag(C26H16)]+ was derived. Finally, in the solid state, the complex [6]helicene–silver triflate–monohydrate (i.e., C26H16–AgCF3SO3–H2O), crystallizing in the monoclinic system with the centro-symmetric P21/c space group, was prepared and analyzed. The characteristic feature of this complex packing in the solid state is the formation of the separated [6]helicene and silver triflate domains. In both of these binding modes, the investigated [6]helicene ligand functions as a molecular tweezer for the univalent silver cation.

Perspectives

By employing electrospray ionization mass spectrometry, it was proven experimentally that the [6]helicene–Ag+ complex (i.e., [Ag(C26H16)]+) exists in the gas phase. Further, applying quantum mechanical DFT calculations, the most probable structure of this cationic complex [Ag(C26H16)]+ was derived. Finally, in the solid state, the complex [6]helicene–silver triflate–monohydrate (i.e., C26H16–AgCF3SO3–H2O), crystallizing in the monoclinic system with the centro-symmetric P21/c space group, was prepared and analyzed. The characteristic feature of this complex packing in the solid state is the formation of the separated [6]helicene and silver triflate domains. In both of these binding modes, the investigated [6]helicene ligand functions as a molecular tweezer for the univalent silver cation.

Dr Vladimír Církva
Institute of Chemical Process Fundamentals

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This page is a summary of: Experimental and theoretical study on cation–π interaction of Ag+ with [6]helicene, Structural Chemistry, June 2015, Springer Science + Business Media,
DOI: 10.1007/s11224-015-0595-7.
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