An Infrared Study of the Steric Effects of Alkyl Substituents on the N–H Stretching Absorptions of <I>sym</I>-Dialkylureas

スポンサーリンク

概要

• 論文の詳細を見る

• By examining their N–H stretching absorptions in the hydrogen-bonding system, the steric effects of the substituent on the C=O or N–H group have been studied for <I>sym</I>-disubstituted alkylureas of the <I>R</I>HNCONH<I>R</I>′ type in carbon tetrachloride. By comparing the estimated percentage of the monomer, it is concluded that the steric effects are not large enough to convert the <I>trans</I> conformation into the <I>cis</I> conformation, though the branched alkyl groups may prevent another molecule from approaching more strongly than the normal alkyl groups. Correlations among some spectral parameters have been examined, such as the estimated percentage of the monomer, the frequency shift upon hydrogen-bond formation, the apparent integrated absorption intensity, and the halfintensity width of the associated band.

• 公益社団法人 日本化学会の論文

著者

• Mido Yoshiyuki

  Department of Chemistry, Faculty of Science, Kobe University

関連論文

• Accordionlike skeletal motions of CH3NHCONH(CH2)nCH3(n=1-15).
• An Infrared Study of the Steric Effects of Alkyl Substituents on the N–H Stretching Absorptions of sym-Dialkylureas
• The Steric Effects of Alkyl Groups on the N–H Stretching Vibrations and the Rotational Isomerism of Alkylureas
• Studies of 8-Mercaptoquinoline as Chelate Agents. II. Infrared Absorption Spectra of its Divalent Metal Chelates

スポンサーリンク