﻿. 
  the 
  Unit-Steve 
  Theory. 
  

   Values 
  of 
  V/W 
  for 
  TetradecylideneC 
  14 
  H 
  2( 
  J 
  

  

  73 
  

  

  M.P. 
  

  

  + 
  10 
  c 
  

   +20 
  

   +30 
  

  

  v. 
  v+ 
  - 
  

  

  240-57 
  243-54: 
  

  

  242-78 
  245-75 
  

  

  244-98 
  247-95 
  

  

  247-26 
  250-23 
  

  

  V/W. 
  

  

  2-970 
  

  

  2-997 
  

   3-024 
  

   3-052 
  

  

  V. 
  of 
  

  

  255-4 
  

   257-71 
  

   260-03 
  

   262-49 
  

  

  V/W. 
  

  

  2-970 
  

   2996 
  

   3-023 
  

   3 
  052 
  

  

  Hexadecylidene, 
  C 
  l6 
  H 
  30 
  | 
  — 
  |. 
  

   d 
  T 
  = 
  -8039{l--00087^. 
  

  

  t. 
  Calc. 
  sp. 
  gr. 
  Observed 
  sp. 
  gr. 
  

  

  20° 
  -8039 
  

  

  30° 
  -7969 
  -7969 
  

  

  T. 
  

  

  d 
  T 
  '. 
  

  

  d 
  T 
  

  

  

  

  d 
  T 
  '' 
  

  

  293° 
  

  

  •8039 
  

  

  1 
  0000 
  

  

  303 
  

  

  •7969 
  

  

  0-9913 
  

  

  313 
  

  

  •7899 
  

  

  0-9826 
  

  

  323 
  

  

  •7829 
  

  

  09739 
  

  

  V 
  + 
  |: 
  

  

  V/W. 
  

  

  276-15 
  

  

  278-59 
  

   281-05 
  

   283-54 
  

  

  27915 
  

   281-59 
  

  

  2-972 
  

   2-996 
  

   3022 
  

   3-048 
  

  

  V.of 
  

  

  CieH 
  3i 
  . 
  

  

  291-47 
  

   294-05 
  

   296-66 
  

   299 
  34 
  

  

  The 
  contraction 
  due 
  to 
  unsaturation 
  is 
  about 
  3 
  units 
  per 
  

   gramme 
  molecule 
  in 
  these 
  acetylenes, 
  although 
  the 
  apparent 
  

   volumes 
  of 
  carbon 
  and 
  hydrogen 
  atoms 
  are 
  the 
  same 
  as 
  for 
  

   the 
  normal 
  saturated 
  paraffins. 
  

  

  The 
  general 
  formula 
  for 
  the 
  acetylenes 
  is 
  thus 
  : 
  — 
  

  

  m.v. 
  of 
  an 
  

  

  2)i-2 
  

  

  = 
  | 
  = 
  6nS-2S-3 
  = 
  WS- 
  = 
  

  

  — 
  I 
  

  

  It 
  will 
  now 
  be 
  convenient 
  to 
  compare 
  the 
  value 
  of 
  S 
  for 
  

   the 
  different 
  acetylenes, 
  plus 
  the 
  amounts 
  of 
  the 
  contraction, 
  

   that 
  is 
  to 
  say, 
  the 
  volumes 
  of 
  H 
  in 
  these 
  compounds, 
  with 
  

   the 
  values 
  found 
  for 
  the 
  paraffins 
  under 
  similar 
  circumstances. 
  

  

  Table 
  XI. 
  

  

  Table 
  showing 
  the 
  validity 
  of 
  the 
  Valency 
  Rule 
  

   for 
  the 
  Acetvlenes. 
  

  

  T. 
  

  

  C 
  12 
  H 
  2G 
  . 
  

  

  C 
  12 
  H 
  22 
  !— 
  . 
  

  

  ^14^2' 
  = 
  • 
  

  

  ^L0**-30 
  ' 
  — 
  

  

  18 
  H 
  34 
  = 
  

  

  M.P 
  

  

  .. 
  2-970 
  

  

  2-970 
  

  

  2-970 
  

  

  2-972 
  

  

  2970 
  

  

  .. 
  +10° 
  . 
  

  

  .. 
  2997 
  

  

  2-997 
  

  

  2997 
  

  

  2-996 
  

  

  

  .. 
  +20.... 
  

  

  .. 
  3025 
  

  

  3-025 
  

  

  3-024 
  

  

  3022 
  

  

  

  ., 
  +30.... 
  

  

  ,. 
  3 
  053 
  

  

  3-054 
  

  

  3-052 
  

  

  3-048 
  

  

  

  „ 
  +40.... 
  

  

  .. 
  3-081 
  

  

  3082 
  

  

  

  

  

  „ 
  +50.... 
  

  

  .. 
  3-111 
  

  

  3112 
  

  

  

  

  

  