Results 51 to 60 of about 576,075 (159)
Sigma Hole Potentials as Tools: Quantifying and Partitioning Substituent Effects
Empirical substituent constants, such as the Hammett parameters, have found important utility in organic and other areas of chemistry. They are useful both in predicting the impact of substitutions on chemical processes and in rationalizing after-the ...
Kelling J. Donald (1613794) +2 more
core +2 more sources
Hammett Studies of Aryldichloromethide Carbanion Reactions
, 2016 Rate constants were measured for the capture of para-substituted phenylchlorocarbenes by chloride ions to form aryldichloromethide carbanions and for the additions of these carbanions to acrylonitrile.
Jingzhi Tian (2474905) +1 more
core +1 more source
, 1968 3-Carboxy-l-phenyl-2-methylcyclopropene and the p-OCH[lowered 3], m-CH[lowered 3], p-F, p-Cl and m-Cl derivatives were prepared by the addition of ethyl diazoacetate to the appropriately substituted 1-phenyl-propyne, followed by hydrolysis.
Thigpen, Arnold B.
core
Correlation between Hammett Substituent Constants and Directly Calculated π-Conjugation Strength
, 2016 The results of an energy decomposition analysis of ortho-, meta-, and para-substituted benzylic cations and para-substituted benzylic anions H2C−C6H4Rq (R = H, F, CN, Me, OH, NH2, NO2, CHO, CO2H; q = +, −) are presented and discussed.
Israel Fernández (2402356) +1 more
core +1 more source
, 2009 A dynamic combinatorial library (DCL) based on benzylidene exchange reactions between imidazolidin-1-ol, nitrone and oxadiazinane (INO) ring-chain-ring tautomers at room temperature is created. The probable mechanism of the reaction is discussed based on
core +1 more source
, 2016 Here we formulate equations based solely on empirical Hammett substituent constants to predict the redox potentials for the electronic excited state of boron-dipyrromethene (BODIPY) dyes.
Richard Lincoln (1411441) +4 more
core +1 more source
Substituent Correlations Characterized by Hammett Constants in the Spiropyran–Merocyanine Transition
, 2017 The modification of molecular properties by the use of substituents is a versatile route for molecular design. Here we show for the example of multiresponsive spiropyrans that substituent effects and their correlations can be accurately described by ...
Michael Sommer (1370583) +15 more
core +1 more source
Euell Hammett oral history interview.
, 2007 Oral history interview with Euell Hammett conducted by David Marshall and Andy Wilkinson on Sept. 4, 2007, in Odessa, Tex. Accompanied by 1 finding aid.Euell Hammett talks about his life, ranch experiences, and remembrances of the Johnson ...
core
Hammett Analysis of a Family of Carbene−Carbene Complex Equilibria
, 2016 p-X-substituted phenylchlorocarbenes (X = NO2, CF3, Cl, H, Me, and MeO) form π-type complexes with trimethoxybenzene in pentane. The carbenes and complexes are in equilibrium, and logarithms of the measured equilibrium constants are well correlated by ...
Karsten Krogh-Jespersen (1397983) +3 more
core +1 more source