The pair(s) of complexes wherein both exhibit tetrahedal geometry is(are) (Note: py =…

Chemistry · JEE Advanced · NTA Exams — Coordination Compounds

1. \(\left[\mathrm{FeCl}_{4}\right]^{-} \text {and }\left[\mathrm{Fe}(\mathrm{CO})_{4}\right]^{2-}\)
2. \(\left[\mathrm{Co}(\mathrm{CO})_{4}\right]^{-} \text {and }\left[\mathrm{CoCl}_{4}\right]^{2-}\)
3. \(\left[\mathrm{Ni}(\mathrm{CO})_{4}\right] \text { and }\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\)
4. \(\left[\mathrm{Cu}(\mathrm{py})_{4}\right]^{+} \text {and }\left[\mathrm{Cu}(\mathrm{CN})_{4}\right]^{3-}\)

Answer

(A) [ FeCl _ 4 ]^ - and [ Fe ( CO )_ 4 ]^ 2-, (B) [ Co ( CO )_ 4 ]^ - and [ CoCl _ 4 ]^ 2-, (D) [ Cu ( py )_ 4 ]^ + and [ Cu ( CN )_ 4 ]^ 3-

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