how many different forms of chloroethane are possible with the formula C2 H6-n Cln (hope the formula is clear)?? The examiner reports say 9 but when I try working it out... i get only 8. Can anyone decipher the 9th chloroethane by that formula?? thnx

 

-mak10

The 9 isoforms for n > 0 are:

 

1) CH3-CH2Cl

2) CH3-CHCl2

3) CH2Cl-CH2Cl

4) CH3-CCl3

5) CH2Cl-CHCl2

6) CH2Cl-CCl3

7) CHCl2-CHCl2

8) CHCl2-CCl3

9) CCl3-CCl3

 

Regards,

m/z

the last compund: CCl3-CCl3 << is this really a 'chloroethane'?? Isn't ethane supposed to have at least one C-H ??

 

-mak10

Perhalogenated alkanes (CnX2n+2) are still classified as alkanes. Please find attached the CAS (Chemical Abstracts Service) entry for C2Cl6:

 

Formula: C2 Cl6

 

CA Index Name: Ethane, hexachloro- (8CI,9CI)

 

Other Names: 1,1,1,2,2,2-Hexachloroethane; Avlothane; Distokal; Distopan; Distopin; Egitol; Ethane hexachloride; Falkitol; Fasciolin; Fron 110; Hexachlorethane; Hexachloroethane; Hexachloroethylene; Mottenhexe; NSC 9224; Perchloroethane; Phenohep

Thanks for clearing that out... appreciate it!

 

-mak10