Determination of the stereochemistry of condensation products between α,β-diamines and α,γ-dioxo compounds by circular dichroism, <sup>1</sup>H NMR and x-ray diffraction期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Determination of the stereochemistry of condensation products between α,β-diamines and α,γ-dioxo compounds by circular dichroism, ¹H NMR and x-ray diffraction

Authors:	N Bernth E Larsen S Larsen

Institution:	Chemistry Department I, The H.C. Ørsted Institute, Universitetsparken 5, DK-2100 Copenhagen, Denmark;Chemistry Department IV, The H.C. Ørsted Institute, Universitetsparken 5, DK-2100 Copenhagen, Denmark

Abstract:	The absolute configuration of molecules containing two chromophores of the type -NH-CC-CO bridged by -?-?- have been studied in solution by UV absorption and circular dichroism. The spectra have been simulated by means of component curves shaped as skew gaussians. The data have been interpreted by means of exciton theory for coupled chromophores to give information about the relative orientation of the chromophores. The result is compared with the result of an X-ray structure determination of N,N'-bis(4-oxo-2-penten-2-yl)-R-1,2-diaminopropane.

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