ON AMMONIACAL PLATINUM B A SES. 95 



M. Ammoniacal-compounds of copper. 



Two-atomic copper (Cupricum), as well as dicopper (Cu 2 or Cuprosum) are apt 

 to form ammoniacal-compounds, but we are, as yet, very slightly acquainted with this 

 kind of compounds of cuprosum. 



The known ammoniacal compounds of cuprosum are: 



1. Cu 2 . 2NH 3 . Cl 2 5 ) 



2. Cu 2 , 2NH 3 . Cl,+ Cu . 2NH 3 . C1 2 +H 2 2 ) 



3. Cu 2 . 8NH 3 . I 8 3 ) 



4. Cu, . 4NH, . L 4 ) 



Copper (Cupricum) seems to have no decided tendency to form triammines, the 

 only compounds containing triammine being: 



|3NH 3 .C1 

 L 0u l8NH,.Cl ) 



2 - MSK 80 * 6 ) 



(2NH 3 .Br 



6 ' (u l3NH 3 . Br ' 



I2NH. 

 The diammine-compounds of copper are very numerous: R=Cu] 91S ttt 3 



1. Hydrate R . 2 HO . + 3H 2 8 ) 



2. Chloride RC1 2 + H 2 9 ) 



3. Cliloroplatinite RCl 4 Pt 10 ) 



4. lodide RI. + FLO 11 ) 



5. Polyiodide RI/^41 12 ) 



6. Nit råte R . 2N0 3 u ) 



7. Perchlorate R . 2CI 4 + 2H 2 " ) 



8. Bromate R . 2Br0 3 15 ) 



9. lodate R . 2I0 3 16 ) 



10. Sulphate R . S0 4 + H 2 O ' 7 ) 



11. Eyposulphate R.S,0 6 18 ) 



12. Succinate R . O., . CO^C 2 H 4 19 ) 



13. Tartrate R . 2 . 2C( )^C,H 2 (OH) 2 20 ) 



14. Anisate R . 2 . C 8 H 7 O . + H..0 21 ) 



