text: Decarbonylation of aldehydes, the reverse of CO insertion, is a well-recognized reaction:
  :RCHO → RH + CO
  The reaction is not widely practiced in part because the alkanes are less useful materials than are the aldehyde precursors. Furthermore, the reaction is not often conducted catalytically because the extruded CO can be slow to dissociate. Extrusion of CO from an organic aldehyde is most famously demonstrated using Wilkinson's catalyst:
  :RhCl(PPh) + RCHO → RhCl(CO)(PPh) + RH + PPh
  Please see Tsuji-Wilkinson Decarbonylation Reaction for an example of this elementary organometallic step in synthesis