Search Results - "Baldwin, John E"

Thermal Rearrangements of Vinylcyclopropanes to Cyclopentenes by Baldwin, John E

“…Baldwin discusses the stereochemical and mechanistic aspects of the vinylcyclopropane rearrangement. A small sampling of related rearrangement and synthetic…”
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The application of interferometry to optical astronomical imaging by Baldwin, John E., Haniff, Christopher A.

“…In the first part of this review we survey the role optical/infrared interferometry now plays in ground–based astronomy. We discuss in turn the origins of…”
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Activation Parameters for Three Reactions Interconverting Isomeric 4- and 6-Deuteriobicyclo[3.1.0]hex-2-enes by Baldwin, John E, Keliher, Edmund J

“…Classic investigations of thermal equilibrations between 4,4-d 2- and 6,6-d 2-bicyclo[3.1.0]hex-2-enes (Doering, W. von E.; Roth, W. R. Angew. Chem., Int. Ed…”
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Thermal Isomerizations of 1-13C-2,2,3,3-d4-Cyclopropane to Isotopically Labeled Trimethylene Diradicals, 1-Propylidenes, and Propenes by BALDWIN, John E., DAY, Linda S., SINGER, Stephanie R.

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On the Stereochemical Characteristic of the Thermal Reactions of Vinylcyclobutane by Baldwin, John E, Kostikov, Alexey P

“…This Perspective outlines the stereochemical and mechanistic complexities inherent in the thermal reactions converting vinylcyclobutane to cyclohexene,…”
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Degenerate thermal isomerizations of bicyclo[3.1.1]hept-2-ene: strategy and analysis by Baldwin, John E., Hudson, Bruce S.

“…Bicyclo[3.1.1]hept‐2‐ene was first prepared and well identified in 1972. In 1974, the degenerate thermal isomerization involving 1‐d‐ and…”
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Suprafacial and Antarafacial Paths for the Thermal Vinylcyclopropane-to-Cyclopentene Rearrangement of 1-Ethenylbicyclo[4.1.0]heptane to Bicyclo[4.3.0]non-1(9)-ene by Baldwin, John E, Burrell, Richard C

“…The gas phase thermal rearrangement of 1-ethenylbicyclo[4.1.0]heptane at 338 °C gives the expected vinylcyclopropane-to-cyclopentene product,…”
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Thermal Isomerizations of cis,anti,cis-Tricyclo[7.4.0.02,8]tridec-10-ene by Leber, Phyllis A, Mann, George R, Hancock-Cerutti, William, Wipperman, Matthew F, Zohrabian, Sylvia, Bell, Ryan M, Baldwin, John E

“…cis,anti,cis-Tricyclo[7.4.0.02,8]tridec-10-ene (13TCT) undergoes [1,3] sigmatropic rearrangements at 315 °C in the gas phase to the si product 1 and to the sr…”
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Quantitative Analyses of Mixtures of 2-Deuterio-1-vinylcyclobutanes by Baldwin, John E, Kiemle, David J, Kostikov, Alexey P

“…Making distinctions between two stereoisomers characterized by diastereotopic deuterium atoms can ordinarily be achieved using standard NMR spectroscopic…”
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Quantitative Analyses of Stereoisomeric 3,4-d2-Cyclohexenes in the Presence of 3,6-d2-Cyclohexenes by BALDWIN, John E, KIEMLE, David J, KOSTIKOV, Alexey P

“…The challenging analytical problem posed by mixtures of the four isomeric 3,4-d(2)-cyclohexenes and the three isomeric 3,6-d(2)-cyclohexenes has been solved…”
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[1,5] Sigmatropic Hydrogen Shifts in Cyclic 1,3-Dienes by Hess, B. Andes, Baldwin, John E

“…Density functional calculations have been carried out for [1,5] hydrogen shifts in 1,3-cycloalkadienes (cyclohexadiene, cycloheptadiene, and cyclooctadiene)…”
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Gas phase thermal reactions of exo-8-cyclopropyl-bicyclo[4.2.0]oct-2-ene (1-exo) by Leber, Phyllis A, Nocket, Anthony J, Hancock-Cerutti, William, Bemis, Christopher Y, Khine, Wint Khant, Mohrbacher Iii, Joseph A, Baldwin, John E

“…The title compound 1-exo (with minor amounts of its C8 epimer 1-endo) was prepared by Wolff-Kishner reduction of the cycloadduct of 1,3-cyclohexadiene and…”
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Thermal [1,5] Hydrogen Sigmatropic Shifts in cis,cis-1,3-Cyclononadienes Probed by Gas-Phase Kinetic Studies and Density Functional Theory Calculations by Baldwin, John E, Raghavan, Anuradha S, Hess, B. Andes, Smentek, Lidia

“…The kinetics of gas-phase thermal [1,5] hydrogen shifts interconverting the five isomeric mono-deuterium-labeled cis,cis-1,3-cyclononadienes have been followed…”
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Quantitative Analyses of Stereoisomeric 3,4-d 2-Cyclohexenes in the Presence of 3,6-d 2-Cyclohexenes by Baldwin, John E, Kiemle, David J, Kostikov, Alexey P

“…The challenging analytical problem posed by mixtures of the four isomeric 3,4-d 2-cyclohexenes and the three isomeric 3,6-d 2-cyclohexenes has been solved…”
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Thermal [1,3] Carbon Sigmatropic Rearrangements of Vinylcyclobutanes by Leber, Phyllis A, Baldwin, John E

“…Stereochemical, kinetic, and theory-based studies of the [1,3] carbon sigmatropic rearrangements of bicyclo[2.1.1]hex-2-enes, bicyclo[3.2.0]hept-2-enes, and…”
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Thermal Reactions of 7-d- and 8-d-Bicyclo[4.2.0]oct-2-enes by Baldwin, John E, Leber, Phyllis A, Powers, David C

“…The gas phase thermal reactions exhibited by bicyclo[4.2.0]oct-2-ene and 7-d and 8-d analogues at 300 °C have been followed kinetically through GC and 2H NMR…”
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Vicinal Deuterium Perturbations on Hydrogen NMR Chemical Shifts in Cyclohexanes by O’Leary, Daniel J, Allis, Damian G, Hudson, Bruce S, James, Shelly, Morgera, Katherine B, Baldwin, John E

“…The substitution of a deuterium for a hydrogen is known to perturb the NMR chemical shift of a neighboring hydrogen atom. The magnitude of such a perturbation…”
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Thermal Chemistry of Bicyclo[4.2.0]oct-2-enes by Powers, David C, Leber, Phyllis A, Gallagher, Sarah S, Higgs, Andrew T, McCullough, Lynne A, Baldwin, John E

“…At 300 °C, bicyclo[4.2.0]oct-2-ene (1) isomerizes to bicyclo[2.2.2]oct-2-ene (2) via a formal [1,3] sigmatropic carbon migration. Deuterium labels at C7 and C8…”
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Thermal Isomerizations of 2-d-1-(E)-Propenylcyclobutanes to 4-d-3-Methylcyclohexenes by Baldwin, John E, Fedé, Jean-Marie

“…Racemic trans-2-d-1-(E)-propenylcyclobutane at 276 °C in the gas phase fragments to give ethylenes and pentadienes, equilibrates with its cis isomer, and…”
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Thermal Stereomutations and Stereochemically Elucidated [1,3]-Carbon Sigmatropic Shifts of 1-(E)-Propenyl-2-methylcyclobutanes Giving 3,4-Dimethylcyclohexenes by Baldwin, John E, Burrell, Richard C

“…The thermal stereomutations and [1,3] carbon sigmatropic shifts shown by (+)-(1S,2S)-trans-1-(E)-propenyl-2-methylcyclobutane and by…”
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