Friedrich August Kekulé von Stradonitz cytaty

Friedrich August Kekulé von Stradonitz Fotografia
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Friedrich August Kekulé von Stradonitz

Data urodzenia: 7. Wrzesień 1829
Data zgonu: 13. Lipiec 1896

Reklama

Friedrich August Kekulé von Stradonitz – chemik niemiecki, profesor na uniwersytecie w Gandawie od 1858 oraz w Heidelbergu i Bonn od 1867, współtwórca teorii budowy związków organicznych.

Udowodnił , że węgiel jest czterowartościowy i że jego atomy w związkach organicznych mogą tworzyć łańcuchy.

Odkrywca pierścieniowej budowy benzenu, co zapoczątkowało nowy dział chemii organicznej - chemię związków aromatycznych. Legenda głosi, jakoby rozwiązanie dręczącego chemika problemu nadeszło we śnie, podczas drzemki przy kominku, w postaci tańczących w kręgu diabłów. W innej anegdocie, podczas snu zobaczył węża, zjadającego własny ogon . Sam uczony jednak tak opisywał odkrycie:

I kolejny opis snu:

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Cytaty Friedrich August Kekulé von Stradonitz

„I fell into a reverie, and lo, the atoms were gamboling before my eyes.“

— August Kekulé
Context: I fell into a reverie, and lo, the atoms were gamboling before my eyes. Whenever, hitherto, these diminutive beings had appeared to me, they had always been in motion. Now, however, I saw how, frequently, two smaller atoms united to form a pair: how a larger one embraced the two smaller ones; how still larger ones kept hold of three or even four of the smaller: whilst the whole kept whirling in a giddy dance. I saw how the larger ones formed a chain, dragging the smaller ones after them but only at the ends of the chains. Statements about a reverie in 1854 (1890), as quoted in "The Experimental Basis of Kekulé's Valence Theory" by Erwin N. Hiebert, in Journal of Chemical Education (1959)<!-- , 36, pp. 321-328 -->

Reklama

„Let us learn to dream, gentlemen, and then perhaps we shall learn the truth . . . but let us beware of publishing our dreams before they have been put to the proof by the waking understanding.“

— August Kekulé
Context: I was sitting writing on my textbook, but the work did not progress; my thoughts were elsewhere. I turned my chair to the fire and dozed. Again the atoms were gamboling before my eyes. This time the smaller groups kept modestly in the background. My mental eye, rendered more acute by the repeated visions of the kind, could now distinguish larger structures of manifold conformation; long rows sometimes more closely fitted together all twining and twisting in snake-like motion. But look! What was that? One of the snakes had seized hold of its own tail, and the form whirled mockingly before my eyes. As if by a flash of lightning I awoke; and this time also I spent the rest of the night in working out the consequences of the hypothesis. Let us learn to dream, gentlemen, and then perhaps we shall learn the truth... but let us beware of publishing our dreams before they have been put to the proof by the waking understanding. Account of his famous dream of the benzene structure, as quoted in A Life of Magic Chemistry : Autobiographical Reflections of a Nobel Prize Winner (2001) by George A. Olah, p. 54<!-- also partially quoted in Serendipity, Accidental Discoveries in Science (1989) by Royston M. Roberts , pp. 75-81 -->

„One of the snakes had seized hold of its own tail, and the form whirled mockingly before my eyes.“

— August Kekulé
Context: I was sitting writing on my textbook, but the work did not progress; my thoughts were elsewhere. I turned my chair to the fire and dozed. Again the atoms were gamboling before my eyes. This time the smaller groups kept modestly in the background. My mental eye, rendered more acute by the repeated visions of the kind, could now distinguish larger structures of manifold conformation; long rows sometimes more closely fitted together all twining and twisting in snake-like motion. But look! What was that? One of the snakes had seized hold of its own tail, and the form whirled mockingly before my eyes. As if by a flash of lightning I awoke; and this time also I spent the rest of the night in working out the consequences of the hypothesis. Let us learn to dream, gentlemen, and then perhaps we shall learn the truth... but let us beware of publishing our dreams before they have been put to the proof by the waking understanding. Account of his famous dream of the benzene structure, as quoted in A Life of Magic Chemistry : Autobiographical Reflections of a Nobel Prize Winner (2001) by George A. Olah, p. 54<!-- also partially quoted in Serendipity, Accidental Discoveries in Science (1989) by Royston M. Roberts , pp. 75-81 -->

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