racemisation造句

• BINOL has axial chirality and the two enantiomers can be readily separated and are stable toward racemisation.
• Racemisation of chiral sugars seems pretty rapid-- so why does the optical purity of your lactic acid matter?
• Bada, & al ., ( 1974 ) published the direct date of 110 ka for this specimen measured by aspartic acid racemisation.
• During the 1970s and 1980s he developed an important technique of marine sediment dating through the measurement of the racemisation rates of amino acids.
• Given a set of reaction conditions the reaction is found to be reversible the presence of acid causes a racemisation process simply by mixing chiral aza-BH adduct, phosphine and acid.
• The difference between S N 1 and S N i is actually that the ion pair is not completely dissociated, and therefore no real carbocation is formed, which else would lead to a racemisation.
• This reaction takes place with racemisation of the propionic acid ester group of ring C . Oxidation ( iodine / acetic acid ) formed lactone "'62 "'and restored the correct stereochemistry at the ring B propionic acid ester tail.