The Structure of Ditropenyliumyl Ether Bis(trifluoromethanesulfonate)

Ronald F. Childs, Romolo Faggiani, Colin J.L. Lock, Carol V. Rogerson

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The X-ray crystal structure of ditropenyliumyl ether bis(trifluoromethanesulfonate) [(C7H6+)2O][CF3SO3]-2, has been determined. The crystals are orthorhombic, Pcnb (No. 60), with cell dimensions a = 7.985 (2) Å, b = 18,571 (6) Å, c = 12.984 (3) Å, and Z = 4. Intensities were measured with a Syntex P21 diffractometer and Mo Kα radiation. The structure was solved by Patterson and difference methods and refined to R1 = 0.075, R2 = 0.042 for 1209 reflections. The cation contains a bent C-O-C system (125.3 (4)°) and the C-O bonds (1.356 (3) Å) are short. There is extensive delocalization in the rings, and the average bond length (1.386 Å) may be shorter than in benzene. The two rings, which have a shallow boat structure, are twisted symmetrically about the C(1)-O-C(1) plane because of the interactions of the α-hydrogen atoms and have a dihedral angle of 113.0 (5)°.

Original languageEnglish
Pages (from-to)3043-3046
Number of pages4
JournalJournal of Organic Chemistry
Issue number18
Publication statusPublished - Sept 1983
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry


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