Results 41 to 50 of about 1,305,934 (203)
Dan Hammett: teapot/ceramics(3) [PDF]
, 2017 ARTIST: Dan Hammett (UD Professor) MATERIAL: ceramics DIMENSIONS: COLLECTION: UDC CATALOG#: UDC.3002.5 LOCATION: Counselor’s office (confirm) PROVENANCE: University of Dallas, 2017From http://www.danhammettceramics.com/: I have been privileged in ...
Hammett, Dan
core
, 1993 The Hammett equation and two-parameter Taft equation are formulated using Rayleigh-Schrödinger perturbational method. The electronic structures of PhS compounds are found for several S substituents by application of INDO quantum method.
W Pietrzycki, P Tomasik
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Angewandte Chemie, EarlyView.HF‐ und HCl‐Lösungen zeigen sehr unterschiedliches Dissoziationsverhalten, weisen jedoch nahezu identische Überschussprotonenspektren auf. Dieser Widerspruch wird durch ein komplementäres Eigen–Zundel Bild aufgelöst. ZUSAMMENFASSUNG Wässrige Lösungen von HF und HCl verhalten sich bei mittleren Konzentrationen sehr unterschiedlich: HCl dissoziiert ...
Louis Lehmann +6 more
wiley +1 more source
Dan Hammett: ceramics (2) [PDF]
, 2017 ARTIST: Dan Hammett (UD Professor) MATERIAL: ceramics DIMENSIONS: 9.5" x 9.5" x 30" COLLECTION: UDC CATALOG#: UDC.3002.4 LOCATION: CFH PROVENANCE: University of Dallas, 2017From http://www.danhammettceramics.com/: I have been ...
Hammett, Dan
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, 1971 A letter from A.B.J. Hammett to Dr. Hector P. Garcia, thanking him for a recent order that Dr. Hector P.
Hammett, A.B.J.
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Acidity Constants of Boronic Acids as Simply as Possible: Experimental, Correlations, and Prediction
MoleculesThe wide use of boronic compounds, especially boronic acids and benzoxaboroles, in virtually all fields of chemistry is related to their specific properties. The most important of them are the ability to form cyclic esters with diols and the complexation
Andrzej Sporzyński +5 more
doaj +1 more source
, 2014 Citation: 'Hammett equation' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.H02732 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire +1 more source
Solvent Effects on ρ Values of the Hammett Equation [PDF]
Bulletin of the Chemical Society of Japan, 1969 Abstract The effects of selvents on ρ values have been systematically treated as a two-variable problem within a linear free-energy relationship framework. It is assumed that the standard activation free energy is a continuous function of σ, a substituent variable, and ξ, a solvent variable.
Yasuhiko Kondo +2 more
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, 1994 Department of Chemistry, University of Kalyani, Kalyani-741 235 Manuscript received 18 February 1993, accepted 29 July 1993 The correlation of solubility and the dissociation constants of benzoic acids with Hammett equation in aquo-ethanolic solutions ...
S. C. LAHIRI, P. K. BISWAS
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Application of the Hammett Equation to Substituted Pyridines
Nippon kagaku zassi, 1967 5-置換ニコチン酸エチルの85%エタノール中のアルカリ性加水分解速度に対しては, Hammettのメタ置換基定数を用いるとよくHammett式が成立し, その反応定数ρHは反応温度25℃のとき2. 26であって, 同条件下の置換安息香酸エチルエステルの反応定数ρBとの比は,ρH/ρB=0. 89であった。 また, 5-置換ニコチン酸の50%エタノール水中におけるρKaについてもよくHammett式が成立し, その反応定数は1. 73で, 同条件下の置換安息香酸のρBに対して, ρH/ρB=1. 08であった。すなわち, 置換基,反応基およびヘテロ原子の三者の問に交叉共役が存在しない場合はρH/ρBが1に近くなる。
Yoshio UENO, Eiji IMOTO
openaire +2 more sources