Although the analytical evidence indicated that CssHsoCh was a diketone, no derivatives of the carbonyl group were obtained. Furthermore, the reduction product did not give reactions of the hydroxyl group although four atoms of hydrogen were apparently added to the diketone. Summary 1. The polyine, tetraphenyl-di-(3-methyl-3-ethylpentinyl-l)-ethane has been prepared. It is oxidized by air, cleaved by 40% sodium amalgam, and rearranges spontaneously to give a more stable isomeric hydrocarbon, C42H46• 2. Some reactions of the rearranged hydrocarbon C42H46 have been studied in the hope of establishing its structure. Cleavage by sodium amalgam has furnished evidence that at least half of the molecule retains the original carbon skeleton.3. The question of final structure of the isomeric hydrocarbon C42H46 and the exact nature of the rearrangement by which it is formed must be left open until further evidence can be obtained.
The Statistics of
Radioactivity MeasurementThe disintegration of radioactive atoms occurs in a completely random manner.There is no way by which one can forecast the time at which any particular atom will disintegrate. A sample of radioactive material may have a true average disintegration rate of perhaps 100 disintegrations per minute. It is improbable, however, that exactly 100 disintegrations occur in any one minute. Indeed, if one reasons without recourse to precise probabilities it might appear likely that in one minute the sample would have only a few disintegrations, in the following minute several hundred disintegrations, and only after a sufficiently long time, an average of 100 disintegrations per minute.
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