102 P. T. CL EVE, 



1. Chloride RC1 4 + 2H 2 



2. Nit råte R . O i . 4N0 2 + 2H 2 O 



3. Sulphate R . 4 . 2S0 2 + 3H 2 O 



O. Ammoniacal-compounds of chromium. 



The hexatomic dichromium united with ammonia produces positive radieles. The 

 ammoniacal eompounds of chromium were discovered by Frémy ') and morc particu- 

 larly studied by me 2 ). Some eompounds of chromium containing sulpho-cyanogen, 

 were discovered by Morland 3 ) and their composition investigated by Reinecke 4 ). I also 

 consider them to be ammoniacal eompounds of dichromium. Triammines of diehro- 

 mium are not known, only diammines and monammines or mono-diammines. 



,-2Ml, 

 VI PNH 



E. Dichromic-diammine R=Cr 2 2 NH 3 



(»Tetramminechrome» Cleve, formerly.) 5 ) 

 1. Chloride RC1 6 + 2H 2 (/ 



fCl 



2. Chloroplatinate R Cl 4 ^Cl 4 (PtCL) 2 + 2H 2 



[Cl 



3. Chloromercurate RCl 6 ^Cl 6 (HgCl) 6 + 2H 2 



IC1 



4. Cldorobromide R L " + 2H,0 



|br 4 



5. Bromide R.Br l! + 2H 2 



6. Bromoeldoride R ^J 2 +2H 2 



7. Chloroiodide R L J 4 2H 2 



8. lodide RI G + 2H 2 0? 



| CL 



9. C/dorosulphate Rw-v ^q^. nn a 



10. Bromosulphate R q " t) on +9HO 



|C1> 



11. Cldorochromate R r\ 9P-0 + XH O 



(Cl, 



12. Chloronitrate R{o 4 . 4 N0 2 + 2H 2 O 



J ) Frémy, Compt. Rend. 47. p. 883. 1859. 2 ) Cleve, K. Svenska Vet.-Ak. Handl. Bd. N:o 4. 1866. 

 3 ) Morland, Qunrt. Journ. Chem. Soc. V. 13. p. 252. 1860. 4 ) Reinecke, Ann. Ch. Pharm. B. 12G. p. 113. 

 1863. J ) All the eompounds of dichromic-diammine and of dichromic-mono-diammine are described by Cleve, 

 1. c. 



