optically inactive การใช้

• The hydrochloride and sulphate salts become optically inactive if heated in a closed vessel above 180 癈.
• Since they affect chirality, they produce optically active products from optically inactive or mixed starting materials.
• The stilbene derivatives are subject to fading upon prolonged exposure to UV, due to the formation of optically inactive cis-stilbenes.
• His goal was to see if addition of the organic dye on the crystalline structure would induce " enhanced optical activity " ( rotation ) of light in the 500-600 nm absorption band on the otherwise optically inactive dye.
• Optically inactive Aze was obtained in small yield from ?-aminobutyric acid by ?-bromination, followed by removal of hydrogen bromide from the intermediate ?-amino-?-butyric acid and ring closure by treatment with a barium hydroxide solution.
• The preparation of L-( " R " )-coniine by the reduction of ?-coniceine ( L-propenylpiperidine ) by L鰂fler and Friedrich incorrectly, that pelletierine was the aldehyde ( ?-2-piperidyl-propaldehyde ) corresponding to coniine, and yielded " rac-" coniine when its hydrazone was heated with sodium ethoxide in ethanol at 156 170 癈 . According to these authors, D-( " S " )-coniine is rendered almost optically inactive when heated with barium hydroxide and alcohol at 180 230 癈 . Leithe has shown by observation of the optical rotation of ( + )-pipecolic acid ( piperidine-2-carboxylic acid ) and some of its derivatives under varying conditions, that it must belong to the D-series of amino acids.