H 2 0],thechlorpentammine or purpureo-chromium salts, R 1 2 [Cr(NH 3) 5 Cl], the nitrito pentammine or xanthochromium salts, R 1 2[N02 (NH3)5 Cr], the luteo or hexammine chromium salts, R 1 3[(NH3) 6 Cr], and the rhodochromium salts: where R 1 = a monovalent acid radical and M = a monovalent basic radical.
Hexammine or Luteo Series [Co(NH3)6] X3.
The above series of salts show striking differences in their behaviour towards reagents; thus, aqueous solutions of the luteo chlorides are strongly ionized, as is shown by their high electric conductivity; and all their chlorine is precipitated on the addition of silver nitrate solution.
The purpureo chloride has only two-thirds of its chlorine precipitated on the addition of silver nitrate, and the electric conductivity is much less than that of the luteo chloride; again in the praseosalts only one-third of the chlorine is precipitated by silver nitrate, the conductivity again falling; while in the triammine salts all ionization has disappeared.
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