Journal
TETRAHEDRON LETTERS
Volume 46, Issue 21, Pages 3665-3667Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2005.03.160
Keywords
acetylene; in situ; coupling; polyynes; copper ions
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Polyynes solutions having as main components C6H2 and C8H2 can be prepared in hydrocarbon solvents by hydrolyzing calcium carbide in an NH4Cl aqueous solution containing Cu(I)/Cu(II) salts. The polyynes are released into a hydrocarbon solvent by acidification with coned. HCl. Heptane solutions with polyynes concentration as high as 0.1 M can be easily prepared. (c) 2005 Elsevier Ltd. All rights reserved.
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