A treatise on chemistry. Vol. III, The chemistry of the hydrocarbons and their derivatives, or, Organic chemistry. Part I / by H.E. Roscoe & C. Schorlemmer.

  • Henry Enfield Roscoe
Date:
1881
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on chemistry. Vol. III, The chemistry of the hydrocarbons and their derivatives, or, Organic chemistry. Part I / by H.E. Roscoe & C. Schorlemmer. Source: Wellcome Collection.

Provider: This material has been provided by University of Bristol Library. The original may be consulted at University of Bristol Library.

    140/744 (page 122)
    by the substitution of one atom of hydrogen by methyl. This replacement may, however, take place either at the end of the chain of carbon atoms or in the central carbon group. Hence two isomerides exist and both of these are known; Butane. Isobutanc. CH, CH, CH2 CH, CH, CH3—C—SH. I CH3 Three isomerides of the next member of the group, CgHj^j* possible, and these are all of them known : Tetrametliylmethane. CH3 C H3—C—C H3 CH, The number of jDossible isomerides increases rapidly as we ascend the series. This is seen by the following table :^ Pentane. Isopentane. CH, 1 CHo CHo CH„ \ / 1 CH 1 CH„ CH, 1 CH3 CH3 No. of carbon atoms .... 1 2 3 4 5 6 7 8 9 10: 11 12 13 No. of possible isomeric paraffins ] 1 1 2 3 5 9 IS 35 /sj 159 357 799 Of these, however, only a relatively small number has as yet been prepared. When an atom of hydrogen in a jiaraffin is replaced b}' a monad element or radical, the compounds of the alcohol radicals are obtained. In this case isomerism commences in the third series, and two propyl alcohols, C.HgO, are known, viz. ; * Ca^'ley, On the analytical forms culled trees, with applications to the theory of chemical combinations, Brit.. Assoc. J!cp. IS'.i, 257. Recalculated by Dr. lierniann of Wiirtzburg, the two last are 355 and 802.