From: peter@tsto.co.uk   
      
   On 11/12/17 07:57, Alaia wrote:   
   > On Sunday, 10 December 2017 02:08:41 UTC+8, John Smith  wrote:   
   >> Is C2H2 planar molecule?Are linear moecules planar? Why?   
   >   
   > Is C3H4 a planar molecule? It's linear around the central C atom though.   
   >   
      
   C3H4 can refer to two molecules: H2C=C=CH2 propadiene (which is not   
   linear, the planes of the pairs of hydrogen atoms at the ends are at   
   right angles to each other) or propyne (not linear either, due to the 3D   
   -CH3 group).   
      
   Peter Fairbrother   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)