Dimethylzinc: Difference between revisions

Latest revision as of 11:34, 15 February 2025

Dimethylzinc[edit]

Dimethylzinc is an organozinc compound with the chemical formula Zn(CH₃)₂. It is a colorless, volatile liquid that is pyrophoric, meaning it ignites spontaneously in air. Dimethylzinc is primarily used in organic synthesis and as a reagent in the preparation of other organometallic compounds.

Structure and Properties[edit]

Dimethylzinc is a linear molecule with a zinc atom bonded to two methyl groups. The Zn-C bond length is approximately 192 pm. The compound is highly reactive due to the polar nature of the Zn-C bond, which makes it a strong nucleophile.

Physical Properties[edit]

Dimethylzinc is a colorless liquid at room temperature with a boiling point of 46 °C. It is highly flammable and reacts violently with water, releasing methane gas. The compound is typically handled under inert gas conditions to prevent accidental ignition.

Chemical Properties[edit]

Dimethylzinc is a strong Lewis acid and can form complexes with various ligands. It reacts with water and alcohols to form zinc oxide and methane. In organic synthesis, it is used to transfer methyl groups to other compounds, a process known as methylation.

Applications[edit]

Dimethylzinc is used in the chemical vapor deposition (CVD) process to deposit thin films of zinc-containing materials. It is also employed in the synthesis of zinc oxide nanoparticles and as a precursor in the preparation of other organozinc compounds.

Safety and Handling[edit]

Due to its pyrophoric nature, dimethylzinc must be handled with extreme care. It is stored under inert gases such as nitrogen or argon to prevent contact with air. Proper personal protective equipment, including gloves and goggles, should be worn when handling the compound.

Related Pages[edit]

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-'''Dimethylzinc''', also known as '''DMZn''' or '''Zinc dimethyl''', is a highly volatile, pyrophoric liquid that is used primarily in the chemical vapor deposition (CVD) of zinc-containing films and semiconductors. It is a compound of zinc with the formula Zn(CH₃)₂. This organozinc compound is significant in organic chemistry as a reagent, particularly in the synthesis of various organic compounds.
+{{DISPLAYTITLE:Dimethylzinc}}
-== Properties ==
+== Dimethylzinc ==
-Dimethylzinc is a colorless, mobile liquid that exhibits extremely reactive properties. It spontaneously ignites upon exposure to air, making its handling and storage critical. The compound has a boiling point of 46°C and a density slightly less than that of water. It is soluble in hydrocarbons, which are often used as solvents for its applications.
+[[File:Dimethylzinc-3D-balls.png|thumb|right|Ball-and-stick model of dimethylzinc]]
+'''Dimethylzinc''' is an organozinc compound with the chemical formula Zn(CH<sub>3</sub>)<sub>2</sub>. It is a colorless, volatile liquid that is pyrophoric, meaning it ignites spontaneously in air. Dimethylzinc is primarily used in organic synthesis and as a reagent in the preparation of other organometallic compounds.
-== Synthesis ==
+== Structure and Properties ==
-The synthesis of dimethylzinc involves the reaction of zinc metal with methyl chloride or methyl iodide, typically in the presence of a lithium chloride catalyst. This process was first described in the 19th century and has undergone various improvements over the years. The reaction is highly exothermic and requires careful control to prevent accidents.
+Dimethylzinc is a linear molecule with a zinc atom bonded to two methyl groups. The Zn-C bond length is approximately 192 pm. The compound is highly reactive due to the polar nature of the Zn-C bond, which makes it a strong nucleophile.
+=== Physical Properties ===
+Dimethylzinc is a colorless liquid at room temperature with a boiling point of 46 °C. It is highly flammable and reacts violently with water, releasing methane gas. The compound is typically handled under inert gas conditions to prevent accidental ignition.
+=== Chemical Properties ===
+Dimethylzinc is a strong Lewis acid and can form complexes with various ligands. It reacts with water and alcohols to form zinc oxide and methane. In organic synthesis, it is used to transfer methyl groups to other compounds, a process known as methylation.
 == Applications ==
-Dimethylzinc is primarily used in the deposition of zinc-containing films and semiconductors through chemical vapor deposition. It serves as a precursor for the growth of zinc oxide (ZnO) layers, which are essential in the fabrication of electronic devices, including solar cells, LEDs, and laser diodes. Additionally, it finds application in organic synthesis, where it is used to introduce methyl groups into organic molecules.
+Dimethylzinc is used in the [[chemical vapor deposition]] (CVD) process to deposit thin films of zinc-containing materials. It is also employed in the synthesis of [[zinc oxide]] nanoparticles and as a precursor in the preparation of other organozinc compounds.
-== Safety ==
+== Safety and Handling ==
-The handling of dimethylzinc requires strict safety measures due to its pyrophoric nature and the potential for explosive reactions with air or moisture. Protective equipment, including gloves and face shields, is mandatory. Storage in inert atmospheres and the use of specialized containers are also critical to prevent accidental ignition.
+Due to its pyrophoric nature, dimethylzinc must be handled with extreme care. It is stored under inert gases such as nitrogen or argon to prevent contact with air. Proper personal protective equipment, including gloves and goggles, should be worn when handling the compound.
-== See Also ==
+== Related Pages ==
+* [[Organozinc compound]]
 * [[Chemical vapor deposition]]
 * [[Zinc oxide]]
-* [[Organometallic chemistry]]
-* [[Pyrophoricity]]
-== References ==
-<references/>
-[[Category:Organometallic compounds]]
+[[Category:Organozinc compounds]]
-[[Category:Zinc compounds]]
+[[Category:Reagents for organic chemistry]]
-[[Category:Chemical compounds]]
-{{Chem-stub}}