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Schultz, T.W.; Ralston, K.E.; Roberts, D.W.; Veith, G.D.; Aptula, A.O. Structure-activity relationships for abiotic thiol reactivity and aquatic toxicity of halo-substituted carbonyl compounds. SAR QSAR Environ. Res. 2007, 18, 1-2, 21–29.

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Schultz, T.W.; Ralston, K.E.; Roberts, D.W.; Veith, G.D.; Aptula, A.O. Structure-activity relationships for abiotic thiol reactivity and aquatic toxicity of halo-substituted carbonyl compounds. SAR QSAR Environ. Res. 2007, 18, 1-2, 21–29.

QDB archive DOI: 10.15152/QDB.75   DOWNLOAD

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Property IGC50: 40-h Tetrahymena toxicity as IGC50 [mmol/L]

Compounds: 27 | Models: 0 | Predictions: 0

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Title: Schultz, T.W.; Ralston, K.E.; Roberts, D.W.; Veith, G.D.; Aptula, A.O. Structure-activity relationships for abiotic thiol reactivity and aquatic toxicity of halo-substituted carbonyl compounds. SAR QSAR Environ. Res. 2007, 18, 1-2, 21–29.
Abstract: Using abiotic thiol reactivity (EC50) and Tetrahymena pyriformis toxicity (IGC50) data for a group of halo-substituted ketones, esters and amides (i.e. SN2 electrophiles) and related compounds a series of structure-activity relationships are illustrated. Only the alpha-halo-carbonyl-containing compounds are observed to be thiol reactive with the order I > Br > Cl > F. Further comparisons disclose alpha-halo-carbonyl compounds to be more reactive than non-alpha-halo-carbonyl compounds; in addition, the reactivity is reduced when the number of C atoms between the carbonyl and halogen is greater than one. Comparing reactivity among alpha-halo-carbonyl-containing compounds with different beta-alkyl groups shows the greater the size of the beta-alkyl group the lesser the reactivity. A comparison of reactivity data for 2-bromoacetyl-containing compounds of differing dimensions reveals little difference in reactivity. Regression analysis demonstrates a linear relationship between toxicity and thiol reactivity: log (IGC(50)(-1)) = 0.848 log (EC(50)(-1)) + 1.40; n=19, s=0.250, r2=0.926, r2(pred)=0.905, F=199, Pr > F=0.0001.
URI: http://hdl.handle.net/10967/75
http://dx.doi.org/10.15152/QDB.75
Date: 2012-05-23


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