Question

IUPAC name of [Co(NH3)4(H2O)Br)(No3)

Answer 1

The given question is incomplete. The complete question is

IUPAC name of $[Co(NH_3)_4(H_2O)Br)](NO_3)_2$

IUPAC name of $[Co(NH_3)_4(H_2O)Br)](NO_3)_2$  is tetraammine aqua bromo cobalt (III) nitrate.

Explanation:

Rules for naming of the coordination compounds :

a) The ligands are named first then metal.

b) The charge of metal indicated with the Roman numerals and enclosed in the parenthesis after metal name.

c) The ligands are named in alphabetical order before the metal ion.

d) Ligands that include a numerical prefix in the name use the prefixes bis for 2, kis for 3, or  or 4 to indicate their number.

e) If the complex ion is an anion, we drop the ending of the metal name and add -ate

In the given coordination compound, Co is the cobalt metal,  $NH_3$ is named as ammine , $H_2O$ is named as aqua , $Br$ is named as bromo and $NO_3$  as nitrato.

Ammine is neutral, Aqua is a neutral, bromo is having an oxidation state of -1 and nitrate is having an oxidation state of -1

x+4(0)+1(0)+1(-1)= +2

x = +3

Hence, the IUPAC name of $[Co(NH_3)_4(H_2O)Br)](NO_3)_2$  is tetraammine aqua bromo cobalt (III) nitrate.

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