N-ALKANES 



CH : 



Branched Chain Alkanes 

 CH 3 CH 3 



CH 



I 



H C H CH 3 (CH 2 ) 13 CH3 CH 3 CHCH 2 CH 2 CH 2 CHCH 2 CH 2 CH 2 CHCH 2 CH 2 CH 2 CHCH 



H 

 Methane 



Pentadecane 



Pristane 



>HC 



,HC 



CYCLOALKANE 

 CH 3 

 I 



CH 2 



CH; 



^C 

 H 2 



Methylcyclohexane 



AROMATICS 



CH ; 



HC 



<? 



C 



CH 



: v 



c 



H 



Toluene 



CH : 



HC 



^\ r / c ^ 



CH 



HC 



H H 



Methylnaphthelene 



CH 



HC 



NAPHTHENO-AROMATIC 



H H 2 



CH; 



HC 



s 



CH 2 



c 



H 2 



Tetralm 



HC 



SULFUR COMPOUND 

 H 



HC 



s 



CH 



CH 



C ' ^ 



H 



Benzothiophene 



OXYGEN COMPOUND 

 OH 



I 



HC ^ CH 



HC 



HC 



S 



NH 2 



I 



C 



NITROGEN COMPOUNDS 



H 



C 



S 



CH 



HC 



H 



CH 



,CH 



HC 



HC 



^ 



p-Cresol 



p-Toluidine 



C N 



H H 



Indole 



CH : 



CH; 



-CH 



CH 



Figure 1 . Classes of compounds found in petroleum. 



98 



