Organic Chemistry Questions and Answers – Organometallic Compounds – 2 | Organic Chemistry Multiple Choice Questions and Answers

Questions
1 Which of the following statement is not true about ferrocene?
A decamethyl ferrocene is staggered in solid state
B cyclopentadienyl rings in ferrocene are almost eclipsed
C cyclopentadienyl ring in ferrocene are staggered
D ferrocene can be nitrated by reaction with dil. HNO3

Answer: cyclopentadienyl ring in ferrocene are staggered
2 Ferrocene cannot undergo which of the following reaction?
A Friedal craft acylation
B Diels-Alder reaction
C Oxidation by Ag + ions
D Electrophilic substitution

Answer: Diels-Alder reaction
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3 Structurally nickelocene is similar to ferrocene but how Nickelocene attains stability?
A due to formation of a monocation
B due to formation of a dication
C due to formation of a monoanion
D due to formation of a dianion

Answer: due to formation of a dication
4 Which of the following is/are true about ferrocene?

I. Ferrocene is diamagnetic

II. Dipole moment is zero

III. Kealy and Pauson synthesizes ferrocene from C5H5 and freshly reduced Fe at 300℃

IV. Kealy and Pauson synthesises ferrocene from C5H5MgBr and FeCl3.

A III and IV
B I, II and III only
C I, II and IV only
D II, III and IV only

Answer: I, II and III only
5 Which type of boranes are B5H9 and B4H10 respectively?
A Nido and Arachano boranes
B Nido and closo boranes
C Closo and Arachano boranes
D Both are Nido

Answer: Nido and Arachano boranes
6 Mn(CO)5 is isolobal with which of the following compound?
A CH4
B CH3
C CH2
D CH

Answer: CH
7 Which of following pair is not isolobal?
A Mn(CO)5, CH3
B [Fe(CO)4], O
C Mn(CO)5, Cl
D Mn(CO)5, O

Answer: Mn(CO)5, O
8 According to wade’s Rule, [C2B10H12] adopts which type of structure?
A closo structure
B nido structure
C archano structure
D hypo structure

Answer: closo structure
9 Which property is the same for isolobal molecules?
A e– capture
B Boiling point
C Melting point
D Solubility

Answer: e– capture
10 Which of the following is not considered as an organometallic compound?
A Ferrocene
B Cis-platin
C Ziese’s salt
D Grignard reagent

Answer: Cis-platin

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