Related Experiment Video
Updated: Aug 1, 2026
10:44
Preparation of Carbon Nanosheets at Room Temperature
Published on: March 8, 2016
Preparation and decomposition of C60H36
Nai-Xing Wang1, Jun-Ping Zhang
1Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China.
The Journal of Physical Chemistry. A
|May 12, 2006
Summary
A milder Benkeser reaction prepares C(60)H(36). Palladium on carbon (Pd/C) proved most effective for its thermal dehydrogenation, offering a promising route for fullerene derivative synthesis.
Area of Science:
- Organic Chemistry
- Materials Science
- Catalysis
Background:
- Fullerene derivatives are crucial in materials science and organic electronics.
- Efficient synthesis and functionalization of fullerene derivatives are ongoing research areas.
- The preparation and dehydrogenation of C(60)H(36) are key steps for further modifications.
Purpose of the Study:
- To develop a milder procedure for synthesizing C(60)H(36).
- To investigate various catalysts for the thermal and photochemical dehydrogenation of C(60)H(36).
- To identify the most effective catalyst for C(60)H(36) thermal decomposition.
Main Methods:
- Synthesis of C(60)H(36) using the Benkeser reaction.
- Thermal dehydrogenation studies employing iridium, palladium on carbon (Pd/C), and nickel-aluminum alloy catalysts.
- Photochemical catalytic dehydrogenation using a rhodium catalyst.
Main Results:
- A significantly milder Benkeser reaction procedure was established for C(60)H(36) preparation.
- Both thermal and photochemical dehydrogenation methods were explored.
- Palladium on carbon (Pd/C) demonstrated superior effectiveness in the thermal decomposition of C(60)H(36) compared to other tested catalysts.
Conclusions:
- The study successfully optimized the synthesis of C(60)H(36) via a milder Benkeser reaction.
- Pd/C is identified as the most efficient catalyst for the thermal dehydrogenation of C(60)H(36) among the investigated options.
- These findings contribute to improved methods for fullerene derivative synthesis and functionalization.
Related Concept Videos
03:08Hydroboration-Oxidation of Alkenes
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
02:34Preparation of Alkynes: Dehydrohalogenation
Introduction
Alkynes can be prepared by dehydrohalogenation of vicinal or geminal dihalides in the presence of a strong base like sodium amide in liquid ammonia. The reaction proceeds with the loss of two equivalents of hydrogen halide (HX) via two successive E2 elimination reactions.
Alkynes can be prepared by dehydrohalogenation of vicinal or geminal dihalides in the presence of a strong base like sodium amide in liquid ammonia. The reaction proceeds with the loss of two equivalents of hydrogen halide (HX) via two successive E2 elimination reactions.
03:00Preparation of Epoxides
Overview
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
02:26Preparation and Reactions of Sulfides
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
01:18Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism
Birch reduction uses solvated electrons as reducing agents. The reaction converts benzene to 1,4-cyclohexadiene. The reaction proceeds by the transfer of a single electron to the ring to form a benzene radical anion. This anion is highly basic—it abstracts a proton from the alcohol to form a cyclohexadienyl radical. Another single electron transfer gives the cyclohexadienyl anion. A proton transfer from the alcohol forms 1,4-cyclohexadiene. Since this reduction occurs via radical anion...
00:51Radical Formation: Elimination
Another method of radical formation is the elimination process. It is the opposite of the addition route and is driven by the instability of the radical. For example, as depicted in Figure 1, dibenzoyl peroxide yields a pair of unstable radicals upon homolysis. Given its instability, this radical spontaneously undergoes elimination via a C–C bond cleavage to form a relatively more stable phenyl radical. The mechanism involves cleavage of the bond between the α and β positions with respect to...