1,725,253 research outputs found

    Block Card 3109 Kimball Avenue

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    This image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Cross gabled | Curved bay | Dwelling (Toledo, Ohio) | 3109 Kimball Avenue (Toledo, Ohio) | Old West End (Toledo, Ohio) | Corydon Heights Addition (Toledo, Ohio) | Dutch Colonial Style | Folk House Styl

    Mechanistic Investigations into the Palladium-Catalyzed Decarboxylative Allylic Alkylation of Ketone Enolates Using the PHOX Ligand Architecture

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    Palladium-catalyzed asymmetric allylic alkylation has become a large and important field for chemical synthesis. Many methodologies in this field offer mild conditions under which challenging and important molecular features can be reliably synthesized, including chiral all-carbon quaternary stereocenters. As a result, palladium- catalyzed asymmetric allylic alkylation has found significant use in total synthesis, and growing use in industry. While the general process of palladium-catalyzed asymmetric allylic alkylation has been studied for decades, there have been a number of recent modifications and developments, such as asymmetric versions of decarboxylative allylic alkylation procedures that are not yet well understood. The development of future implementations and improvements to palladium-catalyzed asymmetric allylic alkylation and related methodologies is expected to be facilitated by a better understanding of these more recent developments, and thus further mechanistic investigation is warranted. Reported herein is a set of investigations into the palladium-catalyzed decarboxylative asymmetric allylic alkylation of ketone enolates using the PHOX ligand architecture. By monitoring the reaction via 31P NMR, a series of previously unidentified key intermediates is discovered. Two representatives of these key intermediates are isolated and characterized. The solution behavior of these species under reaction-like conditions is studied along with a few novel and related complexes. The role of these intermediates and their impact on the behavior of the reaction and product formation is discussed. Previously confounding experimentally observed behavior for this methodology is rationalized via the properties elucidated for these discovered intermediates.</p

    Block Card 3109 Elmview Avenue

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    This image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Ranch Style | Dwelling | 3109 Elmview Avenue (Toledo, Ohio) | Elmhurst Park Addition (Toledo, Ohio) | Deveaux Area (Toledo, Ohio) | West Toledo (Toledo, Ohio

    Block Card 3109 Muirfield Avenue

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    This image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Cape Cod Style | 3109 Muirfield Avenue (Toledo, Ohio) | Dwelling | Heather Downs Addition (Toledo, Ohio) | South Toledo Area (Toledo, Ohio

    Photometry of NGC 3109 carbon stars

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    VizieR online Data Catalogue associated with article published in journal Astronomy &amp; Astrophysics with title 'Carbon star survey in the Local Group. VII. NGC 3109 a galaxy without a stellar halo.' (bibcode: 2003A&amp;A...410..795D

    Block Card 3109 Gracewood Road

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    This image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Ranch Style | Dwelling | 3109 Gracewood Road (Toledo, Ohio) | Elmhurst Park Addition (Toledo, Ohio) | Deveaux Area (Toledo, Ohio) | West Toledo (Toledo, Ohio

    Block Card 3109 Glencairn Avenue

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    This image was produced by the Auditor's Office in Lucas County, Ohio for tax assessment purposes. Associated dates are approximate. Descriptive terms related to this photograph include: Garrison Colonial Style | 3109 Glencairn Avenue (Toledo, Ohio) | Dwelling | Heather Downs Addition (Toledo, Ohio) | South Toledo Area (Toledo, Ohio

    Antlia B: A Faint Dwarf Galaxy Member of the NGC 3109 Association

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    We report the discovery of Antlia B, a faint dwarf galaxy at a projected distance of ~72 kpc from NGC 3109 (M_V ~ -15 mag), the primary galaxy of the NGC 3109 dwarf association at the edge of the Local Group. The tip of the red giant branch distance to Antlia B is D = 1.29 ± 0.10 Mpc, which is consistent with the distance to NGC 3109. A qualitative analysis indicates the new dwarf's stellar population has both an old, metal-poor red giant branch (≳10 Gyr, [Fe/H] ~ −2), and a younger blue population with an age of ~200–400 Myr, analogous to the original Antlia dwarf, another likely satellite of NGC 3109. Antlia B has H i gas at a velocity of v_(helio,HI) = 376 km s^(−1), confirming the association with NGC 3109 (v_(helio) = 403 km s^(−1)). The H i gas mass (M_(H i) = 2.8 ± 0.2 × 10^5 M_☉), stellar luminosity (M_V = −9.7 ± 0.6 mag) and half light radius (r_h = 273 ± 29 pc) are all consistent with the properties of dwarf irregular and dwarf spheroidal galaxies in the Local Volume, and is most similar to the Leo P dwarf galaxy. The discovery of Antlia B is the initial result from a Dark Energy Camera survey for halo substructure and faint dwarf companions to NGC 3109 with the goal of comparing observed substructure with expectations from the Λ+Cold Dark Matter model in the sub-Milky Way regime

    Napier, Patrick E., b. 1925 (SC 3109)

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    Finding aid only for Manuscripts Small Collection 3109. “Kentucky Mountain Square Dancing,” by Patrick E. Napier, Burgin, Kentucky. This monograph (52 pp.) provides a brief historical background and describes the elements of square dancing including steps, dress, music and caller. Also included are terms and definitions, and descriptions (with diagrams) of many square dances commonly found in eastern Kentucky
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