Molecular structures of two conjugated ene-ynes derived from thiophene |
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| Authors: | J Gabriel Garcia Yen-Hsiang Liu Frank R Fronczek |
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| Institution: | (1) Department of Chemistry, Clark Atlanta University, 30314 Atlanta, Georgia;(2) Department of Chemistry, Louisiana State University, 70803-1804 Baton Rouge, Louisiana |
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| Abstract: | The crystal structures of two conjugated ene-yne derivatives of thiophene are described, 2,5-di-(trimethylsilylethynyl)-3,4-dibromothiophene (1), is triclinic P
witha=6.3281(4)Å,b=9.7421(6)Å,c=16.3669(9)Å;  =80.516(5)°,  =84.810(5)°,  =74.072(5)°,Z=2,R=0.054; 2,3,4,5-tetra(trimethylsilylethynyl)thiophene (2), is monoclinic, P21/c with a=20.928(2)Å b=5.852(1)Å,c=23.907(2)Å; =100.245(6)°,Z=4,R=0.049. The ethynylic C atoms of both compounds lie near the thiophene plane, with deviations in the range 0.010(3)–0.455(4)Å. The phenyl groups of2 form a dihedral angle of 13.0(4)°. |
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| Keywords: | Thiophene conjugated ene-ynes |
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