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Cyclohexylamine is used as an intermediate in synthesis of other organic compounds. It is the precursor to sulfenamide -based reagents used as accelerators for vulcanization. The amine itself is an effective corrosion inhibitor. It has been used as a flushing aid in the printing ink industry. [ 5]
The standard model is a quantum field theory, meaning its fundamental objects are quantum fields, which are defined at all points in spacetime. QFT treats particles as excited states (also called quanta) of their underlying quantum fields, which are more fundamental than the particles. These fields are.
The modern synthesis[ a] was the early 20th-century synthesis of Charles Darwin 's theory of evolution and Gregor Mendel 's ideas on heredity into a joint mathematical framework. Julian Huxley coined the term in his 1942 book, Evolution: The Modern Synthesis. The synthesis combined the ideas of natural selection, Mendelian genetics, and ...
In this sense, matter and antimatter particles (such as an electron and a positron) are identified beforehand. The process inverse to particle annihilation can be called matter creation; more precisely, we are considering here the process obtained under time reversal of the annihilation process. This process is also known as pair production ...
Chemically, PCP is a member of the arylcyclohexylamine class, and pharmacologically, it is a dissociative anesthetic. [ 5][ 10][ 11] PCP works primarily as an NMDA receptor antagonist. [ 10] PCP is most commonly used in the United States. [ 12] While usage peaked in the US in the 1970s, [ 13] between 2005 and 2011 an increase in visits to ...
An arylcyclohexylamine is composed of a cyclohexylamine unit with an aryl moiety attachment. The aryl group is positioned geminal to the amine. In the simplest cases, the aryl moiety is typically a phenyl ring, sometimes with additional substitution. The amine is usually not primary; secondary amines such as methylamine or ethylamine, or ...
A more systematic synthesis entails treatment of [B 4 H 9] − with boron tribromide. The Lewis acid abstracts hydride to give unstable B 4 H 8, the precursor to B 5 H 11: [2] [B 4 H 9] − + BBr 3 → B 4 H 8 + HBBr 3 − 2 B 4 H 8 → B 5 H 11 + "B 3 H 5 "
An improved synthesis starts from salts of octahydrotriborate (B 3 H − 8), which is converted to the bromide B 3 H 7 Br − using HBr. Pyrolysis of this bromide gives pentaborane. [7] 5 B 3 H 7 Br − → 3 B 5 H 9 + 5 Br − + 4 H 2. In the U.S., pentaborane was produced on a commercial scale by Callery Chemical Company. Above 150 °C, it ...