210 



Mr. W. Odling on the Formulation of 



secondary radicals pertaining to propane and butane, for in 

 stance, will be named and formulated as follows : — 



Pseudobutyl. 



C 4 HJ or 



-H0{g 



C9H5 



fly 



Pseudopropyl. 

 C 3 H? or-HCJJ^ 



Similarly in the case of the tertiary radicals, the prefix 

 "kata" and the index letter k may well be resorted to, — the 

 latter recalling to memory that in these radicals the carbon 

 (k) of the characteristic marsh-gas residue alone remains un- 

 replaced. The tertiary 4-carbon radical, for instance, will be 

 formulated as C4H9 or -C(CH 3 ) 3 , and be spoken of as kata- 

 butyl. The following Table of 2-, 3-, 4-, and 5-carbon radicals, 

 primary, secondary, and tertiary, is drawn up in accordance 

 with these suggestions. 



Paraffins. Primary Kadicals. Pseudo-Radicals. Kata-Rad 



Propane. 



Propyl. 



Pseudopropyl. 

 XH °{0H 3 3 





Butane. 

 Isobutane. 



f CH 3 



HO^ CH 3 



Butyl. 

 H 2 C{£|> X 



Isobutyl. 

 f CH 2 X 

 HO \ CH 3 



Pseudobutyl. 

 XHc{^ 



Eatabutyl. 

 XC \ CH 3 



Pentane. 

 sJ0 3 H 7 

 10 H 3 



Isopentane. 



HO 



Neopentane. 

 fOH 3 



C CH 3 

 lCH 3 



Pentyl. 



Pseudopentyls. 

 XHCJgA 



XHC 



C 2 H 5 

 C 2 H 5 



HC 



Isopentyle 

 ' C 2 H,X 

 CH, 

 CH, 



Pseudisopentyl. 

 f CHX.CH 3 

 HC^ CH 3 



ICH3 



Katapent 



xo 



fC 2 H 5 



HO CH 3 

 [CH 2 X 



Neopentyl. 



rcH 2 x 



n\ CH 3 



°1CH 3 



lCH 3 



