A) sand-wiched complex
B) pi-bonded complex
C) a complex in which all the five carbon atoms of cyclopentadiene anion are bonded to the metal
D) all of the above
Correct Answer: D
Solution :
Ferrocene or bi-(cyclopentadienyl) iron is an orange-crystalline solid. It is\[Fe{{({{\eta }^{5}}-{{C}_{5}}{{H}_{5}})}_{2}}.\] The structure of ferrocene is regarded as sandwiche structure, in which the iron atom is sandwiched between two \[{{C}_{5}}{{H}_{5}}\]organic rings. The planes of the rings are parallel so that all the carbon atoms are at the same distance from the iron atom. It is a pi-bonded complex. Its structure is as:
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