Nitrogen trifluorideLewis basesIsomeric structuresThe structure, stability, and thermochemistry of isomeric adducts between NF3 and the Lewis acids BH3−nFn (n = 0−3) have been investigated at the coupled-cluster and at the Gaussian-3 (G3) level of theory. At the CCD/cc-pVDZ level both...
We call molecules that contain an odd number of electronsfree radicals. Nitric oxide, NO, is an example of an odd-electron molecule; it is produced in internal combustion engines when oxygen and nitrogen react at high temperatures. To draw the Lewis structure for an odd-electron molecule like ...
based on this Lewis structure. Nitrogen normally has five valence electrons. In Figure 1, it has two lone pair electrons and it participates in two bonds (a double bond) with oxygen. This results in nitrogen having a formal charge of +1. Oxygen normally has six valence electrons. In ...
Lewis bases are compounds that have a free pair of electrons such as tertiary amines while Lewis acids are compounds that can accept a pair of electrons such as boron trifluoride. Lewis acids such as boron trifluoride are so reactive that, in addition to being highly volatile and toxic, their...
Boron trifluoride is an example of a Lewis acid and ammonia is a Lewis base. Ammonia is also a Brønsted base, but boron trifluoride is not a Brønsted acid. Because of the low position of boron in the periodic table, BF3 is electron deficient, which means that it has an sp3 orbital...
The Lewis dot structure for nitrogen shows the symbol, "N," surrounded by a total of three dots. a. True b. False The valence electrons which don't participate in the covalent bond are called the lone pairs. Is the s...
chloropent-2-ene-1,5-diyl)bis(methoxybenzene), was also prepared as one special example. In addition, thegem-difluoroalkanes1were prepared based on previous reports via fluorination of corresponding ketones by (diethylamino)sulfur trifluoride or 4-tert-butyl-2,6-dimethylphenylsulfur trifluoride (...
The chemical reactivity of a set of borophosphines of the general formula R2B-G-PY2, where G is the connector group between the Lewis acidic site, a borane group, and the Lewis basic site, a phosphine fragment, is theoretically investigated through their Lewis acidity and Lewis basicity, as...
Immobilized Lewis Acid catalyst comprising polymer having at least one Lewis Acid immobilized within the structure therein, said polymer having monomer units represented by the structural formula: ##STR1## wherein a represents about 1 to about 99 mole % b represents about 0 to about 50 mole %...
For example, o-nitrotoluene can be reacted in the presence of nitric acid and a boron trifluoride catalyst under reaction conditions sufficient to form dinitrotoluene. Another nitration process which utilizes a Lewis acid catalyst employs aluminum chloride which is added to a metal nitrate. Nitration...