Al(OCArF3)3 - a thermally stable Lewis superacid
Julius F Kögel1, Alexey Y Timoshkin2, Artem Schröder1
1FB Biologie/Chemie , Universität Bremen , Leobener Str. 7 , 28359 Bremen , Germany .
Chemical Science
|December 21, 2018
Summary
A new Lewis superacid, Al(OCArF3)3, was synthesized and characterized. This thermally stable compound exhibits unique reactivity, forming neutral adducts and novel fluoride and chloride complexes.
Area of Science:
- Organometallic Chemistry
- Fluorine Chemistry
- Lewis Acid Chemistry
Background:
- Lewis superacids are crucial catalysts in various chemical transformations.
- Developing new Lewis superacids with enhanced stability and tunable reactivity is an ongoing research area.
- Perfluoroaryl ligands offer unique electronic and steric properties for metal complexes.
Purpose of the Study:
- To synthesize and characterize a novel adduct-free Lewis superacid, Al(OCArF3)3.
- To investigate the thermal stability and reactivity of the synthesized Lewis superacid.
- To explore the formation of adducts with Lewis bases and halide complexes.
Main Methods:
- Synthesis of Al(OCArF3)3 via reaction of ArF3COH with AlEt3.
- Full characterization of the synthesized compound using spectroscopic and analytical techniques.
- Isolation and characterization of neutral adducts and halide complexes.
Main Results:
- Successful synthesis and full characterization of the adduct-free Lewis superacid Al(OCArF3)3.
- Demonstrated high thermal stability of Al(OCArF3)3 up to 180 °C.
- Isolated and characterized various neutral adducts (with MeCN, THF, Et2O, pyridine, OPEt3) and fluoride/chloride complexes.
Conclusions:
- Al(OCArF3)3 is a stable and reactive Lewis superacid.
- The compound's reactivity allows for the formation of diverse adducts and halide complexes.
- This Lewis superacid holds potential for applications in catalysis and materials science.
Related Concept Videos
02:36Lewis Symbols and the Octet Rule
80.8K
Chemical bonds are complex interactions between two or more atoms or ions, which reduce the potential energy of the molecule. Gilbert N. Lewis developed a model called the Lewis model that simplified the depiction of chemical bond formation and provided straightforward explanations for the chemical bonds seen in most common compounds.
80.8K
02:33Lewis Acids and Bases
48.4K
In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
48.4K
02:16Lewis Acids and Bases
17.2K
This lesson delves into Lewis acids and bases in the context of the octet rule for electron-deficient compounds. Here, the concept is discussed, emphasizing the group 13 elements like boron or aluminium. Since group 13 elements possess three valence electrons, they form trivalent compounds with a sextet of electrons and a vacant orbital for the central atom. Consequently, these electron-deficient compounds accept electrons from other species to complete their octet in a chemical reaction. They...
17.2K
02:46Covalent Bonding and Lewis Structures
61.3K
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
61.3K
02:54Lewis Structures of Molecular Compounds and Polyatomic Ions
45.2K
To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
45.2K
01:27Thermal expansion and Thermal stress: Problem Solving
2.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
2.2K