The molecular structure and conformation of acetamides in the vapour phase: Part II. 2-Iodoacetamide |
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Authors: | S. Samdal R. Seip |
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Affiliation: | Department of Chemistry, University of Oslo, Blindern, Oslo 3 Norway |
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Abstract: | 2-Iodoacetamide has been studied by electron diffraction, utilizing a new nozzle construction. A skew conformation with a dihedral angle of 126.3(1.1)° from syn (C-I bond eclipsing the C-N bond), and a gauche conformation with a dihedral angle of 42.3(1.6) both fit the experimental data almost equally well. However, comparison with the X-ray structure and the results for the two models indicate a slight preference for the skew form.The most important structural parameters are: rg(CO) = 1.222(3)Å, rg(C-N) = 1.370(3)Å, rg(C-C) = 1.515(4) Å, rg(C-I) = 2.160(4) Å, ∠αOCC = 120.0(6)°, ∠αNCC = 116.9(4)° and ∠αCCl = 117.3(4)°. Parenthesized values are one standard deviation. |
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