Cobaltocene: Difference between revisions

Latest revision as of 11:15, 15 February 2025

An organometallic compound of cobalt

Cobaltocene, also known as bis(cyclopentadienyl)cobalt(II), is an organometallic compound with the formula Co(C_H_)_. It is a member of the metallocene family, which are compounds consisting of a metal sandwiched between two cyclopentadienyl anions. Cobaltocene is notable for its bright orange color and its air sensitivity.

Structure and Bonding[edit]

Cobaltocene is a sandwich compound, where the cobalt atom is situated between two parallel cyclopentadienyl rings. The compound exhibits a staggered conformation, which is typical for metallocenes. The cobalt center in cobaltocene is in the +2 oxidation state, and the compound is 19-electron, making it paramagnetic.

Synthesis[edit]

Cobaltocene can be synthesized by the reaction of cobalt(II) chloride with sodium cyclopentadienide in an inert atmosphere. The reaction proceeds as follows:

${CoCl}_{2} + 2 {NaC}_{5} H_{5} \to {Co(C}_{5} H_{5})_{2} + 2 NaCl$

The product is typically purified by sublimation under vacuum.

Properties[edit]

Cobaltocene is a bright orange solid that is sensitive to air and moisture. It is soluble in nonpolar organic solvents such as benzene and toluene. Due to its paramagnetic nature, cobaltocene is often used in studies of magnetic properties of organometallic compounds.

Applications[edit]

Cobaltocene is used as a precursor in the synthesis of other organometallic compounds. It also serves as a reducing agent in organic synthesis and is used in the study of electron transfer processes. Additionally, cobaltocene is of interest in the field of molecular electronics due to its redox properties.

Safety[edit]

Cobaltocene should be handled with care, as it is sensitive to air and moisture. It should be stored under an inert atmosphere, such as nitrogen or argon, to prevent decomposition.

Related pages[edit]

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-{{png-image}}
+{{Short description|An organometallic compound of cobalt}}
-'''Cobaltocene''', also known as '''bis(cyclopentadienyl)cobalt(II)''' or '''Co(Cp)_2''', is an [[organometallic compound]] of [[cobalt]] and [[cyclopentadiene]]. It is a [[paramagnetic]] [[sandwich compound]] and is considered a [[metallocene]], similar to [[ferrocene]] but with cobalt in place of iron. Cobaltocene has been extensively studied for its interesting properties and potential applications in [[materials science]], [[catalysis]], and [[organic synthesis]].
+{{DISPLAYTITLE:Cobaltocene}}
-==Structure and Properties==
+[[File:Cobaltocene_crystals.png|thumb|right|Cobaltocene crystals]]
-Cobaltocene is composed of two [[cyclopentadienyl]] anions (Cp) bound to a central cobalt atom (Co) in a sandwich-like structure. This configuration grants cobaltocene a high degree of [[symmetry]] and contributes to its stability. The compound is typically described as having a +2 oxidation state for cobalt, with each cyclopentadienyl ring acting as a one-electron donor.
-The molecule is [[paramagnetic]], possessing one unpaired electron, which is unusual for a metallocene. This property arises from the electronic configuration of the cobalt atom, which contributes to the compound's distinctive red color and its magnetic properties.
+'''Cobaltocene''', also known as '''bis(cyclopentadienyl)cobalt(II)''', is an organometallic compound with the formula Co(C_H_)_. It is a member of the [[metallocene]] family, which are compounds consisting of a metal sandwiched between two [[cyclopentadienyl]] anions. Cobaltocene is notable for its bright orange color and its air sensitivity.
+==Structure and Bonding==
+Cobaltocene is a [[sandwich compound]], where the cobalt atom is situated between two parallel cyclopentadienyl rings. The compound exhibits a staggered conformation, which is typical for metallocenes. The cobalt center in cobaltocene is in the +2 oxidation state, and the compound is 19-electron, making it paramagnetic.
 ==Synthesis==
-Cobaltocene can be synthesized through the reaction of [[sodium cyclopentadienide]] (NaCp) with [[cobalt(II) chloride]] (CoCl_2) in a [[tetrahydrofuran]] (THF) solution. The reaction typically yields cobaltocene as a red solid, which can be purified through sublimation or recrystallization.
+Cobaltocene can be synthesized by the reaction of [[cobalt(II) chloride]] with sodium cyclopentadienide in an inert atmosphere. The reaction proceeds as follows:
+<math>\text{CoCl}_2 + 2 \text{NaC}_5\text{H}_5 \rightarrow \text{Co(C}_5\text{H}_5)_2 + 2 \text{NaCl}</math>
+The product is typically purified by sublimation under vacuum.
+==Properties==
+Cobaltocene is a bright orange solid that is sensitive to air and moisture. It is soluble in nonpolar organic solvents such as [[benzene]] and [[toluene]]. Due to its paramagnetic nature, cobaltocene is often used in studies of magnetic properties of organometallic compounds.
 ==Applications==
-Cobaltocene has been explored for various applications, primarily due to its ability to easily undergo oxidation and reduction, making it a useful [[redox]] agent in organic synthesis. It has been employed as a one-electron reducing agent in the synthesis of other organometallic compounds and in the reduction of certain organic substrates.
+Cobaltocene is used as a precursor in the synthesis of other organometallic compounds. It also serves as a reducing agent in organic synthesis and is used in the study of electron transfer processes. Additionally, cobaltocene is of interest in the field of [[molecular electronics]] due to its redox properties.
-In materials science, cobaltocene's magnetic properties have prompted research into its use in magnetic materials and as a component in molecular electronics. Its stability and redox activity also make it a candidate for use in rechargeable battery technologies.
-==Safety and Handling==
+==Safety==
-Cobaltocene is relatively stable, but it should be handled with care due to its reactivity, especially towards air and moisture. It is typically stored under an inert atmosphere in a dry, cool place to prevent decomposition. Safety precautions similar to those used with other organometallic compounds, such as wearing gloves and eye protection, are recommended.
+Cobaltocene should be handled with care, as it is sensitive to air and moisture. It should be stored under an inert atmosphere, such as nitrogen or argon, to prevent decomposition.
-==See Also==
+==Related pages==
 * [[Metallocene]]
-* [[Organometallic chemistry]]
+* [[Ferrocene]]
-* [[Cyclopentadienyl complex]]
+* [[Nickelocene]]
-* [[Paramagnetism]]
-[[Category:Organometallic compounds]]
+[[Category:Organometallic chemistry]]
 [[Category:Cobalt compounds]]
-{{chemistry-stub}}