Stabilities of electron donor–acceptor complexes of aromatic hydrocarbons with 1-(2,4,6-trinitrophenyl)propan-2-one in solution from nuclear magnetic resonance shift measurements
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 9,p. 1385-1389
- https://doi.org/10.1039/p29830001385
Abstract
The change in the chemical shifts of the three singlets in the 1H n.m.r. spectrum of 1-(2,4,6-trinitrophenyl)propan-2-one (picrylacetone)(A) as a function of the concentration of various added aromatic hydrocarbons, acting as electron donors (D), has been measured under the conditions [D][A]. The results are more consistent with an association in which bimolecular complexes (DA) and termolecular complexes (D2A) are formed than with a recently proposed model which involves the formation of complexes with only a 1 : 1 stoicheiometry together with ‘additional unspecific shielding’(AUS) of both complexed and uncomplexed acceptor by the donor molecules.Keywords
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