MCQ
$\pi-$ bonding is not present in
- ✓Grignard reagent
- BDibenzene chromium
- CZeise’s salt
- DFerrocene
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$(a)$ $N,N-$ Dimethylaniline
$(b)$ $2,4 -$ Dimethylaniline
$(c)$ $N -$ methy $l-o-$ methylaniline
$(d)$ $p -$ Methylbenzylamine

Benzene $(C_6H_6)$ $+\,C{{H}_{3}}-CH=C{{H}_{2}}\,\xrightarrow{{{H}^{\oplus }}}A\xrightarrow{{{O}_{2}}}B$ $\xrightarrow{{{H}^{\oplus }}\,/\,\Delta }C+$$\begin{matrix}
O \\
|| \\
C{{H}_{3}}-C-C{{H}_{3}} \\
\end{matrix}$
The structure of intermediate compound $'B'$ will be