﻿346 
  

  

  Dr. 
  H. 
  S. 
  Allen 
  on 
  Molecular 
  

   Table 
  IV. 
  

  

  Name. 
  

  

  Formula. 
  

  

  N. 
  

  

  NvXlO- 
  12 
  , 
  

  

  Maleic 
  anhydride 
  ... 
  

   Succinic 
  anhydride... 
  

   Malic 
  acid 
  (I) 
  

  

  <(CH.OO) 
  2 
  >0 
  

  

  <(CH 
  2 
  CO)>0 
  

  

  C0 
  2 
  H.CH 
  2 
  \CHOH.C0 
  2 
  H 
  

  

  C0 
  2 
  H.C0 
  2 
  H+2H 
  2 
  

  

  C0 
  2 
  H.CH:OH.C0 
  2 
  H 
  

  

  (0O 
  2 
  H 
  . 
  CH 
  2 
  ) 
  2 
  0(OH)CO 
  2 
  H+H 
  2 
  O 
  

  

  CO 
  2 
  H[0H(OH)] 
  2 
  CO 
  2 
  H 
  

  

  50 
  

   52 
  

   70 
  

   66 
  

   60 
  

   110 
  

   78 
  

  

  60-17, 
  

   70-56 
  

   8211 
  

   82-24 
  

   82-42 
  

   93-71 
  

   93-79 
  

  

  Oxalic 
  acid 
  

  

  Maleic 
  acid 
  

  

  Citric 
  acid 
  

  

  Tartaric 
  acid 
  

  

  

  Here 
  the 
  characteristic 
  difference 
  is 
  found 
  between 
  the 
  

   two 
  anhydrides 
  ; 
  the 
  three 
  dibasic 
  acids, 
  malic, 
  oxalic, 
  and 
  

   maleic, 
  have 
  a 
  common 
  value 
  for 
  the 
  product 
  but 
  different 
  

   values 
  for 
  N 
  ; 
  and 
  citric 
  acid 
  (a 
  monohydroxy 
  tribasic 
  

   acid) 
  and 
  tartaric 
  acid 
  (a 
  dihydroxy 
  dibasic 
  acid) 
  have 
  the 
  

   same 
  value 
  for 
  Nz; 
  x 
  10 
  ~ 
  12 
  , 
  but 
  a 
  value 
  exceeding 
  the 
  previous 
  

   common 
  value 
  by 
  the 
  characteristic 
  difference. 
  

  

  Data 
  are 
  available 
  for 
  a 
  larger 
  number 
  of 
  aromatic 
  deri- 
  

   vatives, 
  and 
  amongst 
  these 
  compounds 
  many 
  interesting 
  

   correspondences 
  occur. 
  In 
  Table 
  V. 
  are 
  given 
  the 
  results 
  

   for 
  a 
  number 
  o£ 
  hydroxyl 
  derivatives 
  containing 
  the 
  benzene 
  

   ring, 
  and 
  in 
  Table 
  VI. 
  some 
  of 
  the 
  halogen 
  derivatives 
  of 
  

   benzene 
  in 
  which 
  the 
  two 
  substituted 
  groups 
  occupy 
  the 
  

   para 
  position. 
  

  

  Table 
  V. 
  

  

  Name. 
  

  

  Formula. 
  

  

  N. 
  

  

  NrXlO" 
  12 
  . 
  

  

  Phenol 
  

  

  C 
  6 
  H 
  5 
  OH 
  

   0H 
  3 
  . 
  C 
  6 
  H 
  4 
  OH 
  

   (CH 
  3 
  ) 
  2 
  C 
  6 
  H 
  3 
  OH 
  

   C 
  6 
  H 
  4 
  (OH) 
  2 
  

   C 
  6 
  H 
  3 
  (OH) 
  3 
  

  

  50 
  

   58 
  

   66 
  

   58 
  

   66 
  

  

  6329 
  

   64-23 
  

  

  72-84 
  

   82-07 
  

   82-52 
  

  

  Cresole 
  (p) 
  

  

  Xylenol 
  

  

  Hydroquinone 
  (p) 
  ... 
  

   Pyrogallol 
  

  

  Table 
  VI. 
  

  

  Name. 
  

  

  Formula. 
  

  

  N. 
  

  

  Ni/XlO- 
  12 
  . 
  

  

  Chlor 
  phenol 
  

  

  C1C 
  6 
  H 
  4 
  0H 
  

  

  C 
  6 
  H 
  4 
  C1 
  2 
  

  

  C1C 
  6 
  H 
  4 
  N0 
  2 
  

  

  BrC 
  6 
  H 
  4 
  OH 
  

  

  C 
  6 
  H 
  4 
  Br 
  2 
  

  

  BrC 
  6 
  H 
  4 
  N0 
  2 
  

  

  66 
  

   74 
  

   80 
  

   84 
  

   110 
  

   98 
  

  

  68-40 
  

   6963 
  

  

  78-86 
  

   79-41 
  

   88-64 
  

   8995 
  

  

  Dichl 
  or 
  benzene 
  

  

  Chlor 
  nitrobenzene 
  ... 
  

   Brom 
  phenol 
  

  

  Dibrom 
  benzene 
  

  

  Brom 
  nitrobenzene 
  ... 
  

  

  