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  • Help me understand! The formula dichloridobis (urea) copper (II) is

The formula dichloridobis (urea) copper (II) is

  • Option 1)

    \left [Cu\left \{0=(CNH_{2})_{2} \right \} \right ] Cl_{2}

  • Option 2)

    \left [Cu\:\:Cl_{2} \left \{O=C(NH_{2})_{2} \right \}_{2}\right ]

  • Option 3)

    \left [Cu\left \{0=C(NH_{2})_{2} \right \}Cl \right ]Cl

  • Option 4)

    \left [ Cu\:\:Cl_{2} \right ] \left [ 0=C(NH_{2})_{2} \right H_{2}]

 

Answers (1)

best_answer

As we learnt in 

Writing the name of Complex compound formula -

(i) Cation is named first 

(ii) ligands are named in alphabetical order before name of central metal atom.

(iii) Prefixes, mono, di, tri are used to indicate the no of ligands

(iv) when name of ligand used a numerical prefix, then term bix, tris, tetrakis are used.

eg:

\left [ Ni\ Cl_{2}\left ( PPh_{3} \right )_{2} \right ]

is named as dichlorobis (triphenylphosphine)nickel(II)

(v) Oxidation state is represented by roman numerical in parenthesis

(vi) If the complex ion is an anion, the name of metal ends with suffix -ate

eg: co in complex anion \left [ Co\left ( SCN_{4} \right ) \right ]^{2-}

is called cobaltate.

fe - ferrate

- wherein

 

The formula for dichlorobis (Urea) Copper (II) is 

\left [ CuCl_{2} \left \{ O=C \left ( NH_{2} \right )_{2} \right \}_{2}\right ]

 

 


Option 1)

\left [Cu\left \{0=(CNH_{2})_{2} \right \} \right ] Cl_{2}

This option is incorrect 

Option 2)

\left [Cu\:\:Cl_{2} \left \{O=C(NH_{2})_{2} \right \}_{2}\right ]

This option is correct 

Option 3)

\left [Cu\left \{0=C(NH_{2})_{2} \right \}Cl \right ]Cl

This option is incorrect 

Option 4)

\left [ Cu\:\:Cl_{2} \right ] \left [ 0=C(NH_{2})_{2} \right H_{2}]

This option is incorrect

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