Which of the following species represent organometallic...

Which of the following species represent organometallic compounds:
$\mathrm{BrMgC} \equiv \mathrm{CCH}_{2} \mathrm{CH}_{3} ;$ (b) $\mathrm{NaOCH}_{2} \mathrm{CH}_{3} ;$ (c) $\mathrm{KOC}\left(\mathrm{CH}_{3}\right)_{3} ;$ (d) PhLi?

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Key Concepts

Grignard reagents

Grignard reagents are a subset of organometallic compounds that contain a carbon-magnesium bond. They are typically prepared by reacting an alkyl or aryl halide with magnesium metal, and they serve as powerful nucleophiles in a range of organic synthetic transformations, especially in forming new carbon–carbon bonds.

Organolithium compounds

Organolithium compounds are another important group within organometallic chemistry characterized by a carbon-lithium bond. They are exceptionally reactive due to the high polarity of the bond and are commonly used as bases and nucleophiles in organic synthesis when constructing carbon–carbon bonds or for various functional group transformations.

Organometallic compounds

Organometallic compounds are a class of chemical compounds characterized by the presence of at least one direct bond between a metal and a carbon atom. This metal-carbon bond imparts unique reactivity, making such compounds widely useful in chemical synthesis, catalysis, and various industrial processes.

Metal–carbon bond

The metal–carbon bond is the defining feature of organometallic chemistry. Its character, which can range from predominantly covalent to highly polar or ionic, governs the reactivity, stability, and overall behavior of the compound in chemical reactions.

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