R. Dykstra

Publications71
h-index14
Citations504
Highly Influential Citations6
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Effects of Ion Pair Separation on Inversion and Rotation of Sulfur‐, Selenium‐, and Silicon‐Stabilized Organolithium Reagents
Most vinyl,['] cyclopropyl,[*' and a -a lko~y[~] lithium reagents are configurationally stable. Other types racemize too rapidly for trapping experiments[4". '1 or require very low temperatures to… Expand
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Advocacy & objectivity : a crisis in the professionalization of American social science, 1865-1905
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The Cattle Towns
"Excellent . . . readable and persuasive. . . . One of the most refreshing and rewarding approaches to be applied to western history topics in many years."-American Historical Review
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Quantifying the Wild West: The Problematic Statistics of Frontier Violence
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Serial Marriage and the Origins of the Black Stepfamily: The Rowanty Evidence
Whether intended or not, an impression conveyed by Herbert G. Gutman's enormously important monograph, The Black Family in Slavery and Freedom, 1750-1925, is that bondage had less an impact than… Expand
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Bright Radical Star: Black Freedom and White Supremacy on the Hawkeye Frontier
"Bright Radical Star" traces the evolution of frontier Iowa from arguably the most racist free state in the ante-bellum Union to one of its most outspokenly egalitarian, linking these mid-westeners'… Expand
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A nuclear magnetic resonance spectroscopic technique for the characterization of lithium ion pair structures in THF and THF/HMPA solution
Lithium cations coordinated by HMPA undergo sufficiently slow dynamic exchange on the NMR time scale at low temperature that distinct cation-HMPA complexe can usually be observed. This observation is… Expand
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Solution ion pair structure of 2-lithio-1,3-dithianes in THF and THF-HMPA
Abstract An NMR study of 2-lithio-1,3-dithiane and 2-triorganosilyl-, 2-tert-butyl- and 2-phenyl-2-lithiodithianes reveals that all are contact ion pair species in THF and all become separated ions… Expand
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Triple Ion Formation in Localized Organolithium Reagents
A variety of aggregation motifs dominate the structural chemistry of organolithium compounds. At least four distinct modes of dimerization exist: the common 4-center dimers,1 6-center dimers as in… Expand
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Solution Structure of Lithium Benzeneselenolate and Lithium Diphenylphosphide: NMR Identification of Cyclic Dimers and Mixed Dimers
Organometallics is published by the American Chemical Society. 1155 Sixteenth Street N.W., Washington, DC 20036 Solution Structure of Lithium Benzeneselenolate and Lithium Diphenylphosphide: NMR… Expand
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