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Theoretical additivity in multipath 13 C, 1 H coupling constants
Author(s) -
Contreras R. H.,
Scuseria G. E.
Publication year - 1984
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.1270220614
Subject(s) - propagator , coupling constant , chemistry , additive function , atomic physics , polarization (electrochemistry) , molecule , physics , computational chemistry , molecular physics , quantum mechanics , mathematics , mathematical analysis
Different path contributions to the Fermi contact term of carbon‐hydrogen coupling constants in several bicycloalkanes were calculated using the ‘inner projections of the polarization propagator’ (IPPP) approach. The ground‐state wave functions were calculated at the INDO level of approximation. Three and four‐bond contributions to the couplings, and the through‐space transmission via the rear lobes of the CX (X H, F) bonds attached to the bridgehead carbon atoms, were calculated. The additivity of these contributions compared with the total INDO couplings is good. Similar paths in different molecules give dissimilar contributions to the couplings.