Calculations of Cotton Effects in the Vacuum UV Region for Aldonic Acid 1,4-Lactones and Interpretations of Hudson's Lactone Rule
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چکیده
A graphic method of Drude equation was applied to a series of aldonic acid 1,4-lactones 1-7 to investigate possible Cotton effects below 200nm. The calculation shows three bands at 220nm, 170 nm and 130 nm to reflect the stereochemistries at C-2, C-4 and rtng conformations and vicinal OH at C-3 and C-4, respectively. The sum of the rotational contributions at 589 nm of these bands explained the applicability of Hudson's lactone rule in sugar lactones.
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