PG entrance exam CUET PG 2025 Mock Test Chemical Sciences Organometallic Compounds Metal Carbonyls and Metal Nitrosyls
Arrange the following complexes in increasing order of C—O stretching frequency:
-
Ni(CO)4
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[Co(CO)4]−
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[Fe(CO)4]2−
Ni(CO)4
[Co(CO)4]−
[Fe(CO)4]2−
1
\([Fe(CO)_4]^{2−} < [Co(CO)_4]^− < Ni(CO)_4\)
2
\(Ni(CO)_4 < [Co(CO)_4]^− < [Fe(CO)_4]^{2−}\)
3
\([Co(CO)_4]^− < Ni(CO)_4 < [Fe(CO)_4]^{2−}\)
4
\([Fe(CO)_4]^{2−} < Ni(CO)_4 < [Co(CO)_4]^−\)