Lecture notes for chemical students. Vol. 2, Organic chemistry / by Edward Frankland.

  • Frankland, Edward, 1825-1899.
Date:
1872
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Licence: Public Domain Mark

Credit: Lecture notes for chemical students. Vol. 2, Organic chemistry / by Edward Frankland. Source: Wellcome Collection.

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    fCELMell _ ICEtMeH “ Methy lo- ethylated methyl. (Molecule.) rCMeH, CaEeH CMeH CMeH. rcii3 I CH., CMeH CMeH CH, CH fCH 1 CH j CH'CCH^) . ] CH(CH3) • ! CH., ich; rcH3 r JCMe3 _ CMe. 1 |cMe3 - CMe: - ] [CH3‘ [ Trimethylated methyl. (Molecule.) CH3 C(CH3)(CH3) C(CH3)(CH3)- CH It will be seen, on comparing the above formulae with the graphic representation of the respective compounds, that both express the same ideas of constitution. Thus in the developed symbolic formula of normal butyl it is evident that the two ex¬ treme carbon atoms are each united with three atoms of hydrogen and one of carbon, and all the intermediate carbon atoms with two of hydrogen and two of carbon, exactly as shown in the following graphic representation :— H H H H H H H H I I I I M I I I H—C—C—C—C——C—C—C—C—li I I I I M I I I H H 11 H : H H H H normal butyl or propylatcd methyl. (Molecule.) From the developed symbolic formula of methylo-ethylated methyl, it is evident that the two central carbon atoms are united with three atoms of carbon and one of hydrogen, that the two extreme carbon atoms are united with one atom of car¬ bon and three of hydrogen, that the intermediate carbon atoms are joined to two hydrogen and two carbon atoms, and that the remaining carbon atoms are each combined with one atom of carbon, and three of hydrogen, tlius:—