History
In 1948 several scientists H.H Sisler, J.D. Bush and O. E. Accountius noted an isolation in the compound with the empirical composition CrO8•2C5H5N, a brick-red complex, from a reaction of anhydrous chromium trioxide with pyridine. G. I. Poos, G. E. Arth, R. E. Beyler and L.H. Sarett in 1953 found the complex in pyridine solution to be an effective reagent for the oxidation of primary and secondary alcohols to aldehydes and ketones. In 1968 J. C. Collins, W. W. Hess, and F. J. Frank found the anhydrous complex is moderately soluble in polar chlorocarbons. They found the solvent of choice was methylene chloride with the solubility of 12.5 g/100 mL. Under those conditions yields of 87-98% of primary and secondary alcohols were oxidized to aldehydes and ketones.
Read more about this topic: Collins Reagent
Famous quotes containing the word history:
“To history therefore I must refer for answer, in which it would be an unhappy passage indeed, which should shew by what fatal indulgence of subordinate views and passions, a contest for an atom had defeated well founded prospects of giving liberty to half the globe.”
—Thomas Jefferson (1743–1826)
“Yet poetry, though the last and finest result, is a natural fruit. As naturally as the oak bears an acorn, and the vine a gourd, man bears a poem, either spoken or done. It is the chief and most memorable success, for history is but a prose narrative of poetic deeds.”
—Henry David Thoreau (1817–1862)
“History ... is, indeed, little more than the register of the crimes, follies, and misfortunes of mankind.
But what experience and history teach is this—that peoples and governments have never learned anything from history, or acted on principles deduced from it.”
—Georg Wilhelm Friedrich Hegel (1770–1831)