Interbenzylic  19 F, 19 F spin‐spin coupling constants in bis(fluoromethyl) arenes | Zendy

Ernst Ludger | Zendy; Pulmann Sabine | Zendy

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Interbenzylic 19 F, 19 F spin‐spin coupling constants in bis(fluoromethyl) arenes

Author(s) -

Ernst Ludger,

Pulmann Sabine

Publication year - 1981

Publication title -

organic magnetic resonance

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0030-4921

DOI - 10.1002/mrc.1270160117

Subject(s) - benzene , coupling constant , ring (chemistry) , chemistry , spin (aerodynamics) , double bond , perpendicular , coupling (piping) , crystallography , aromaticity , stereochemistry , medicinal chemistry , computational chemistry , materials science , polymer chemistry , molecule , organic chemistry , physics , geometry , thermodynamics , mathematics , particle physics , metallurgy

Five‐ to eleven‐bond F,F spin coupling is observed in bis(fluoromethyl)arenes. According to INDO MO calculations, these couplings are transmitted mainly via the aromatic π‐system. The low preference of 1,4‐(CH 2 F) 2 ‐benzene for the conformation in which the CF bonds are perpendicular to the aromatic ring isshown by the strong increase of 7 J(FF) upon double ortho‐substitution.

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