What are the systematic names for the following ions and compounds? [co(nh3)4cl2] cr(nh3)3cl3 [co(en)2br2] [co(nh3)6]cl3

The sphere part is name first. Sphere part is positive part. In sphere also, legend is name first in alphabetical order. As the charge on sphere is positive that is why name of metal will remains unchanged and the oxidation number of metal is written in bracket.

At last the name of negative part is written.

Co(NH3)4Cl2

Tetraamminedichlorocobalt (IV) chloride

As, we have 4 ammine and two chlorine. So, according to alphabetical order ammine comes first and then chlorido.

Cr(NH3)3Cl3

Triamminetrichloridocromium(lll) l)

This compound contain 3 ammine and 3 chlorido. So, according to alphabetical order ammine comes first and then chlorido.

As oxidation number of chromium is 3, it is written in bracket in roman number.

Co(en)2Br2

Dichlorobis(ethylenediamine) cobalt (III) ion.

[Co(NH3)6]Cl3

hexaammine cobalt (III) chloride.

Thus, the IUPAC name of

Co(NH3)4Cl2]

Tetraamminedichlorocobalt (IV) chloride

Cr(NH3)3Cl3
Triamminetrichloridocromium(ll)
Co(en)2Br2
Dichlorobis(ethylenediamine) cobalt (III) ion.
[Co(NH3)6]Cl3

hexaammine cobalt (III) chloride.

learn more about IUPAC name:

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