Which of the following statements is incorrec | vedclass

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(B) An organometallic compound is defined as a compound containing at least one metal-carbon bond.$(1)$ $Al_4C_3$ (Aluminum carbide) is an ionic carbi

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$1$ and $3$

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(B) An organometallic compound is defined as a compound containing at least one metal-carbon bond.$(1)$ $Al_4C_3$ (Aluminum carbide) is an ionic carbide,not an organometallic compound,as it does not contain a direct metal-carbon covalent bond.$(2)$ Metal carbonyls (e.g.,$Ni(CO)_4$) are organometallic compounds because they contain metal-carbon bonds.$(3)$ $TEL$ (Tetraethyl lead,$Pb(C_2H_5)_4$) is a $\sigma$-bonded organometallic compound,not a $\pi$-bonded one.$(4)$ Frankland reagent $(R_2Zn)$ is a $\sigma$-bonded organometallic compound.Therefore,statements $(1)$ and $(3)$ are incorrect.

Which of the following statements is incorrect?
$(1)$ $Al_4C_3$ is an organometallic compound.
$(2)$ Metal carbonyls are organometallic compounds.
$(3)$ $TEL$ (Tetraethyl lead) is a $\pi$-bonded organometallic compound.
$(4)$ Frankland reagent is a $\sigma$-bonded organometallic compound.

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Which of the following statements is incorrect?$(1)$ $Al_4C_3$ is an organometallic compound.$(2)$ Metal carbonyls are organometallic compounds.$(3)$ $TEL$ (Tetraethyl lead) is a $\pi$-bonded organometallic compound.$(4)$ Frankland reagent is a $\sigma$-bonded organometallic compound.