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Electron spin resonance studies of anion radicals of phenylmethylsilanes
(1971)
Anion radicals of various phenylsilanes were prepared by potassium and electrolytic reductions. Their esr spectra were analyzed. A large value of the silicon-hydrogen coupling constant (a[subscript Si-H]) was consistently ...
[Sigma]-intermediates in the chemistry of nitrogen heterocycles
(1971)
Using nmr spectroscopy, stable σ-intermediates were detected in the reactions of organolithium compounds with pyridine and several substituted pyridines. In the reactions of phenyllithium with 3-picoline (or with ...
Structure-spectra relationships of aliphatic methyl ethers and primary amines
(1971)
For a series of methyl ethers, CH₃OR, the following properties have been measured: (a) the relative nmr chemical shifts, neat and in carbon tetrachloride solution, of the methyl protons, (b) the relative chemical shifts ...
A study on column behavior
(1971)
Competitive relationships among selected species of flycatchers (Tyrannidae) in Trans-Pecos Texas
(1971)
Two pairs of species (Tyrannus verticalis and T. vociferans, Sayornis nigricans and S. saya) were selected for a study of competitive relationships among sympatric species of birds in the Trans-Pecos region of Texas. Field ...
Cyclization studies of some vinylcycloalkanols
(1971)
Several vinylcycloalkanols have been treated with acidic reagents (most generally, formic acid) in order to study the synthetic, mechanistic, and stereochemical potentials of their cyclizations. The model systems initially ...
An analysis of the supply of grains in the Pergamino region of Argentina: a "dynamic" approach
(1971)
The analysis of production response of grains in the Pergamino area was subject to analysis in a dynamic setting by use of a recursive linear programing model. The model is based on the recursive model developed by Richard ...
Celestial navigation for high school students
(1971)
There is a felt need among many high school students and educators for special interest topics. A syllabus was written, designed to teach the students how to determine a position by celestial means. This is a topic which ...
A study of the factors which affect the results of short-term multi-rate gas well tests
(1971)
The performance of gas wells as indicated by the Bureau of Mines back-pressure test was evaluated. A gas well in a new reservoir, in a reservoir with prior production history and with a horizontal fracture was investigated. ...