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An example of a spirocyclic compound is the photochromic switch spiropyran. In fused/condensed [ 5 ] bicyclic compounds , two rings share two adjacent atoms. In other words, the rings share one covalent bond, i.e. the bridgehead atoms are directly connected ( e.g. α-thujene and decalin ).
Departments of Computer Science and Chemistry at Nazarbayev University de novo molecules generated by ML models SMILES, computed properties artificially generated "cheML.io". [3] 2,800,000 ChemDB chemical database small molecules "ChemDB". 5,000,000 ChemExper Chemexper Chemical Directory catalogue chemicals CASno Structure SMILES "ChemExper".
Spiro compounds are often prepared by diverse rearrangement reactions. For example, the pinacol-pinacolone rearrangement is illustrated below. [3]: 985 is employed in the preparation of aspiro[4.5]decane. [12]]. The synthesis of a spiro-keto compound form a symmetrical diol
Note, elsewhere an organic chemistry shorthand is used where hydrogen atoms are inferred as present to fill the carbon's valence of 4 (rather than their being shown explicitly). Paclitaxel , another complex, plant-derived terpenoid , also a natural product, displaying a complex multi-ring structure including 4-, 6-, and 8-membered rings ...
Heterocyclic organic chemistry is the branch of organic chemistry dealing with the synthesis, properties, and applications of organic heterocycles. [2] Examples of heterocyclic compounds include all of the nucleic acids, the majority of drugs, most biomass (cellulose and related materials), and many natural and synthetic dyes. More than half of ...
In organic chemistry, a coupling reaction is a type of reaction in which two reactant molecules are bonded together. Such reactions often require the aid of a metal catalyst.
In chemistry, catenation is the bonding of atoms of the same element into a series, called a chain. [1] A chain or a ring may be open if its ends are not bonded to each other (an open-chain compound), or closed if they are bonded in a ring (a cyclic compound). The words to catenate and catenation reflect the Latin root catena, "chain".
Organosilicon chemistry is the study of organometallic compounds containing carbon–silicon bonds, to which they are called organosilicon compounds. Most organosilicon compounds are similar to the ordinary organic compounds, being colourless, flammable, hydrophobic, and stable to air.