43 bureaucrats work for the us government.
43 bureaucrats work for the us government.
how many bureaucrats work for the us government?
43
Na
Na
it was first observed by chemist paul walden in 1896. he was able to convert one enantiomer of a chemical compound into the other enantiomer and back again in a so-called walden cycle which went like this: (+) chlorosuccinic acid (1 in "scheme 1") was converted to (+) malic acid 2 by action of silver oxide in water with retention of configuration, in the next step the hydroxyl group was replaced by chlorine to the other isomer of chlorosuccinic acid 3 by reaction with phosphorus pentachloride, a second reaction with silver oxide yielded (-) malic acid 4 and finally a second reaction with pcl returned the cycle to its starting point.
walden inversion