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REVISTA DE CHIMIE
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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2007, Volume 58, Issue 1,





Helical Distortion of N-Phenacyl-1,10-Phenanthrolinium Bromide


Abstract:

Single crystal X-ray analysis of 1-[2-phenyl-2-oxoethyl]-1,10-phenanthrolinium bromide was undertaken to establish whether helical distortion, inferred from solution 1H NMR spectra, persists in the solid state. The compound crystallizes in the orthorhombic space group Pna21 with a =19.7497(2), b = 6.5729(1), c = 25.9402(3) Å and Z = 8 (two independent formula units in the asymmetric unit). An intramolecular hydrogen bond between the pyridine N atom and one of the methylene H atoms occurs in each cation, resulting in helical distortion of the phenanthrolinium moiety, so that the N-C-C-N+ torsion angles range between 3 and 7°. Keywords: 1-[2-Phenyl-2-oxoethyl]-1,10-phenanthrolinium bromide, helical distortion, X-ray analysis

Issue: 2007, Volume 58, Issue 1
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