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56 results on '"R.H. Prince"'

51. Abstracts and Reviews : 2. Africa

Author

R.H. Prince

Subjects
medicine.medical_specialty, Traditional medicine, business.industry, Family medicine, Alternative medicine, medicine, General Medicine, business
Published
1989

53. Nucleophilic substitution at silicon and germanium: II. Hydrolysis of methyl substituted acetates

Author

R.H. Prince and R.E. Timms

Subjects
Aqueous solution, Inorganic chemistry, Entropy of activation, chemistry.chemical_element, Germanium, Medicinal chemistry, Ion, Inorganic Chemistry, chemistry.chemical_compound, Hydrolysis, chemistry, Materials Chemistry, Nucleophilic substitution, A value, Carboxylate, Physical and Theoretical Chemistry
Abstract

The series of compounds (n−Pr) 3 MO.CO.CH (3−n) Me n M = Si and Ge = O to 3) were prepared and the rates of hydrolysis measured in aqueous dioxane. The entropy of activation is shown to be the main factor determining the rate differences. pK a Values of the substituted acetic acids correlate well with log(k 1 ). A transition state similar to a solvated proton and a solvated carboxylate ion is proposed.

Published
1968

54. Polarography of Cobaloximes

Author

R.H. Prince and M.G. Segal

Subjects
Inorganic Chemistry, Polarography, Chemistry, Inorganic chemistry, Materials Chemistry, Physical and Theoretical Chemistry
Published
1974

56. Electron and ion emission from zirconium, yttrium and scandium during chlorine and bromine adsorption

Author

R.H. Prince and E.B.Deblasi Bourdon

Subjects
inorganic chemicals, Bromine, Chemistry, Inorganic chemistry, chemistry.chemical_element, Surfaces and Interfaces, Condensed Matter Physics, Dissociation (chemistry), Ion, Surfaces, Coatings and Films, Adsorption, Chemisorption, Halogen, Chlorine, Materials Chemistry, Scandium
Abstract

Previous work on exoelectron and ion emission during chemisorption under UHV conditions has been extended to include halogen (chlorine, bromine) adsorption on group IIIA (Y, Sc) and group IA (Zr) surfaces, both clean and with Na predosing. Ionic species observed include Na + Cl − and NaCl − 2 . By means of double dosing experiments, it is shown conclusively that the latter dichloride ion is formed by direct titration of Na by Cl − 2 , and that halogen dissociation is not a precursor step.

Published
1984

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