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The branch point at α-ketoisovalerate could explain this variation. A carbon isotope effect at C-2 (indicated by blue arrows) would be needed for this branch point to affect the isotopic composition of downstream products. This position is the site of transamination to produce valine or acetylation to produce β-isopropylmalate.
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A transition metal carbene complex is an organometallic compound featuring a divalent carbon ligand, itself also called a carbene. [1] Carbene complexes have been synthesized from most transition metals and f-block metals, [2] using many different synthetic routes such as nucleophilic addition and alpha-hydrogen abstraction. [1]
Perfluoroalkanes are very stable because of the strength of the carbon–fluorine bond, one of the strongest in organic chemistry. [4] Its strength is a result of the electronegativity of fluorine imparting partial ionic character through partial charges on the carbon and fluorine atoms, which shorten and strengthen the bond (compared to carbon-hydrogen bonds) through favorable covalent ...
The inorganic carbon species include carbon dioxide, carbonic acid, bicarbonate anion, and carbonate. [5] It is customary to express carbon dioxide and carbonic acid simultaneously as CO 2 *. C T is a key parameter when making measurements related to the pH of natural aqueous systems, [6] and carbon dioxide flux estimates.
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Radioisotopes of hydrogen, carbon, phosphorus, sulfur, and iodine have been used extensively to trace the path of biochemical reactions. A radioactive tracer can also be used to track the distribution of a substance within a natural system such as a cell or tissue , [ 1 ] or as a flow tracer to track fluid flow .
Arrow pushing or electron pushing is a technique used to describe the progression of organic chemistry reaction mechanisms. [1] It was first developed by Sir Robert Robinson . In using arrow pushing, "curved arrows" or "curly arrows" are drawn on the structural formulae of reactants in a chemical equation to show the reaction mechanism .
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