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An Optically Active D-Aldopentose Produced an Optically Inactive Aldaric Acid

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Essay

An optically active D-aldopentose produced an optically inactive aldaric acid upon treatment with HNO3. When this aldopentose was subjected to a Ruff degradation, a D-aldotetrose was generated. This aldotetrose gave an optically inactive alditol upon reduction with NaBH4. Use these data to provide the structure of the starting D-aldopentose.


Definitions:

Effective Interest Method

A method of amortizing the discount or premium on bonds payable that results in a constant rate of interest over the life of the bond.

Semiannual

Occurring twice a year; a term often used in the context of payments, reporting periods, or interest calculations.

Par Value

A nominal value assigned to a share of stock in the charter of a corporation, unrelated to market value.

Effective Interest Amortization

A method of allocating loan interest payments over the life of the loan, taking into account the varying principal amounts.

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