﻿86 
  

  

  Mr. 
  Gervaise 
  Le 
  Bas 
  on 
  

  

  They 
  will 
  be 
  shown 
  to 
  manifest 
  still 
  greater 
  contractions 
  than 
  

   those 
  which 
  have 
  been 
  associated 
  with 
  the 
  cyclic 
  compounds 
  

   previously 
  considered. 
  This 
  the 
  following 
  table 
  shows. 
  

  

  Table 
  XXII. 
  

  

  Table 
  giving 
  the 
  Contractions 
  associated 
  with 
  

   Anthracene 
  and 
  Phenanthrene. 
  

  

  Compound. 
  

  

  Anthracene, 
  C 
  14 
  H 
  10 
  

  

  Phenanthrene, 
  C 
  U 
  H 
  : 
  

  

  Formula. 
  

  

  V. 
  W. 
  

  

  ^ 
  CH 
  V/ 
  CH 
  \^ 
  CH 
  \ 
  

  

  CH 
  

  

  CH 
  

  

  CH 
  !195o 
  66 
  

  

  CH 
  

  

  n 
  X 
  3-7 
  

  

  244-2 
  

  

  "Vjh^ch/^ch/ 
  

  

  CH 
  CH 
  CH 
  

  

  I 
  I 
  1 
  

   CH 
  C 
  C 
  

  

  waAa 
  

  

  >CH' 
  

  

  CH 
  

  

  CH 
  CH 
  

  

  1962 
  

  

  m 
  

  

  48-7 
  

  

  244-2 
  

  

  A. 
  

  

  4s 
  

  

  The 
  contractions 
  brought 
  out 
  by 
  the 
  above 
  calculations 
  are 
  

   quite 
  considerable. 
  No 
  doubt 
  chrysene 
  Ci 
  8 
  H 
  12 
  would 
  manifest 
  

   a 
  still 
  higher 
  contraction. 
  

  

  The 
  above 
  investigations 
  show 
  that 
  when 
  compounds 
  

   possess 
  what 
  is 
  usually 
  considered 
  to 
  be 
  cyclic 
  structure 
  a 
  

   notable 
  contraction 
  occurs. 
  The 
  contractions 
  have 
  magni- 
  

   tudes 
  which 
  are 
  probably 
  dependent 
  on 
  the 
  number 
  of 
  atoms 
  

   in 
  the 
  nuclei, 
  and 
  on 
  the 
  kind 
  of 
  nucleus. 
  It 
  is 
  scarcely 
  to 
  

   be 
  doubted 
  that 
  significant 
  additive 
  relations 
  are 
  also 
  to 
  be 
  

   noticed 
  under 
  all 
  corresponding 
  conditions. 
  Only 
  the 
  barest 
  

   outline 
  of 
  the 
  theory 
  can 
  here 
  be 
  given, 
  but 
  it 
  is 
  hoped 
  to 
  

   amplify 
  it 
  as 
  other 
  compounds 
  come 
  up 
  for 
  consideration. 
  

   A 
  point 
  of 
  practical 
  utility 
  is 
  likely 
  to 
  be 
  found 
  in 
  the 
  

   possibility 
  of 
  identifying 
  cyclic 
  or 
  nuclear 
  structure 
  in 
  

   aliphatic 
  compounds, 
  a 
  mailer 
  Eor 
  which 
  there 
  is 
  very 
  little 
  

   physical 
  evidence 
  at 
  present 
  at 
  command. 
  A 
  paper 
  on 
  this 
  

   subject 
  is 
  in 
  preparation. 
  

  

  