Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, Computed Properties of C7H7BrO873-75-6, Name is (4-Bromophenyl)methanol, SMILES is OCC1=CC=C(Br)C=C1, belongs to bromides-buliding-blocks compound. In a article, author is Yan, Rui, introduce new discover of the category.
Fixation of CO2 into Cyclic Carbonates by Halogen-Bonding Catalysis
Halogen bonding, parallel to hydrogen bonding, was introduced into the catalytic cycloaddition of carbon dioxide into epoxide (CCE) reactions. A series of halogen-bond donor (XBD) catalysts of N-iodopyridinium halide featured with N-I bond were synthesized and evaluated in CCE reactions. The optimal XBD catalyst, 4-(dimethylamino)-N-iodopyridinium bromide ([DMAPI]Br), under screened conditions at 100 degrees C, ambient pressure, and 1 mol % catalyst loading, realized 93 % conversion of styrene oxide into cyclic carbonate in 6 h. The substrate scope was successfully extended with excellent yields (mostly >= 93 %) and quantitative selectivity (more than 99 %). H-1 NMR spectroscopy of the catalyst [DMAPI]Br on substrate epoxide certified that the N-I bond directly coordinated with the epoxide oxygen. A plausible mechanism of halogen-bonding catalysis was proposed, in which the DMAPI cation functioned as halogen-bond donor to activate the epoxide, and the counter anion bromide attacked the methylene carbon to initiate the ring-opening of the epoxide. CCE reactions promoted by N-iodopyridinium halide, exemplify a first case of halogen-bonding catalysis in epoxide activation and CO2 transformation.
Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 873-75-6. Computed Properties of C7H7BrO.