Encyclopaedia Britannica, 11th Edition, "Clervaux" to "Cockade" / Volume 6, Slice 5

by Various

Tetrammine Series. This group may be divided into the

Praseo-salts [R2Co(NH3)4]X, where X = Cl.

Croceo-salts [(NO2)2Co(NH3)4]X, which may be considered as a subdivision of the praseo-salts.

Tetrammine purpureo-salts [RCo(NH3)4·H2O]X2.

Tetrammine roseo-salts [Co(NH3)4·(H2O)2]X3.

Fuseo-salts [Co(NH3)4]OH·X2.

Pentammine Series.

Pentammine purpureo-salts [R·Co(NH3)5]X2 where X = Cl, Br, NO3, N02, ½SO4, &c.

Pentammine roseo-salts [Co(NH3)5·H2O]X2.

Hexammine or Luteo Series [Co(NH3)6]X3.