Why are S-N Bonds so Rare in Nature? Theelements C. H. N. 0and S are thesole building blacksofa very high proportion of all naturally-occurring organic ~mnonmds. There are fifteen oossible two-atom combinations of these five elements. and livine have evolved ways . . svstems . making hand\ latwrrn all of w r h romhinations. M I I ~uf there two.atom honds are, of course, uhiquitc~us.For the less. common hund rombinati~,nssurhn: H.H and 0.0 there are hnctcrin thnt produce hydrogenpas. aud inserts. plnnts, fitnp. and algae that manufacture peroxides. Even the N.0 bund la qwte well rrprrsenterl in nata~rnlpnalort chemiztry. IIC in chlornmphenirol teontalnsa n~trn.groupl,museimol tisoxazole ring) or rycssin tl\'.
