Polyhedron, ( ISI ), Year (2007-3)

Title : ( 2,3J(P,X) [X = H, C] coupling constants dependency on the ring )

Authors: Mehrdad Pourayoubi , Khodayar Gholivand , Zahra Shariatinia ,

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New diazaphospholes and diazaphosphorinanes (1–12) were synthesized and characterized by 1H, 13C, 31P NMR, mass and IR spectroscopy and elemental analysis. The factors which affect the 2,3J(P,X) (X@H, C) coupling constants in compounds 1–12 were considered. The ring size and the hybridization are parameters which change the 2J(PNH) coupling constant in the sequence benzodiazaphospholes > diazaphospholes > diazaphosphorinanes. Also, attention was paid to exocyclic substituent effects. Asymmetric diazaphospholes 5–8 indicate two different 2J(P,C)aliphatic values, and the more deshielded carbon atom has a higher coupling constant. The crystal structures of compounds 7 and 10–12 were determined by X-ray crystallography. Hydrogen bonds produce a 2D framework for compound 10, which is composed of two symmetrically independent molecules. Compounds 7, 11 and 12 exist as a polymeric chain, 2D framework and centrosymmetric dimer, respectively, which are made by hydrogen bonds.


, Diazaphospholes; Diazaphosphorinanes; NMR; X, ray crystallography
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author = {Pourayoubi, Mehrdad and Khodayar Gholivand and Zahra Shariatinia},
title = {2,3J(P,X) [X = H, C] coupling constants dependency on the ring},
journal = {Polyhedron},
year = {2007},
month = {March},
issn = {0277-5387},
keywords = {Diazaphospholes; Diazaphosphorinanes; NMR; X-ray crystallography},


%0 Journal Article
%T 2,3J(P,X) [X = H, C] coupling constants dependency on the ring
%A Pourayoubi, Mehrdad
%A Khodayar Gholivand
%A Zahra Shariatinia
%J Polyhedron
%@ 0277-5387
%D 2007