Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Exam: CSIR-NET 2013 · Marks: 2 · Difficulty: Medium
The orbital interactions shown below represent
(a)CH-Al interactions in $\mathrm{Al_2(CH_3)_6}$
(b)B-H interactions in $\mathrm{B_2H_6}$
(c)CH-Li interaction in $\mathrm{Li_4(CH_3)_4}$
(d)$\mathrm{CH_3CH_2}$-Mg interactions in $\mathrm{EtMgBr.(OEt_2)_2}$
Answer
Answer (as printed): C
Explanation
The diagram clearly indicates the four-centre-two-electron interaction (4c-2e). This takes place in $\mathrm{Li_4(CH_3)_4}$. The $sp^3$ hybrid orbital is of carbon, while the three $s$-orbitals are of the three surrounding lithium atoms.