The Size and Shape of Molecules

  • R. B. Barlow


Some indication of the size of molecules is given by their molecular weight but more precise information can be obtained from measurements of density. For a pure liquid
$$ density = \frac{{theweightof1mole}}{{thevolumeof1mole}} = \frac{M}{{{V_m}}}$$
where M is the molecular weight and V m. is the molal volume. If the density can be measured to 4 decimal places, the molal volume can be calculated to 0.1 cm3, and by comparing values of V m. for different compounds, at the same temperature, it is possible to obtain an idea of the size of various groups.1 Some values are listed in Table 3.1.


Torsion Angle Tartaric Acid Absolute Configuration Quantitative Aspect Geometrical Isomer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© R.B. Barlow 1980

Authors and Affiliations

  • R. B. Barlow
    • 1
  1. 1.University of BristolUK

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