In chemistry, a hypervalent molecule (the phenomenon is sometimes colloquially known as expanded octet) is a molecule that contains one or more main group...

definitively excluding the role of d-orbital hybridisation in bonding in hypervalent compounds of second-row (period 3) elements, ending a point of contention...

attain this configuration in compounds. There are, however, some hypervalent molecules in which the 3d level may play a part in the bonding, although this...

of six fluorine atoms attached to a central sulfur atom. It is a hypervalent molecule.[citation needed] Typical for a nonpolar gas, SF 6 is poorly soluble...

4-electron (3c–4e) bond is a model used to explain bonding in certain hypervalent molecules such as tetratomic and hexatomic interhalogen compounds, sulfur...

known to medieval alchemists as "volatile spirit of sulfur". SO2 is a bent molecule with C2v symmetry point group. A valence bond theory approach considering...

participation of d orbitals is unimportant, and the bonding of so-called hypervalent molecules are, for the most part, better explained by charge-separated contributing...

violently with water to produce highly corrosive sulfuric acid. Hypervalent molecule Sulfur trioxide pyridine complex Greenwood, Norman N.; Earnshaw,...

Gaseous and molten PCl5 is a neutral molecule with trigonal bipyramidal geometry and (D3h) symmetry. The hypervalent nature of this species (as well as...

iodine-atom. In the molecular orbital model, a common explanation for the hypervalent bonding on the central iodine involves a three-center four-electron bond...

These are the hypervalent organoiodines, often called iodanes after the IUPAC rule used to name them. These iodine compounds are hypervalent because the...

also be moved in the same way to create resonance structures for hypervalent molecules such as sulfur hexafluoride, which is the correct description according...

used by many force fields, and allows the VALBOND method to handle hypervalent molecules and transition metal complexes. The VALBOND energy term has been...

noncoordinating anions. In contrast to this tetrachloride, SF4 is a neutral molecule. It decomposes above −30 °C (242 K) to sulfur dichloride and chlorine....

fluorine atoms as Shyp (for hypervalent) and Stop. The fluorine atoms are labelled Ftop attached to Stop, and on the hypervalent S atom: Fcis, the closest...

solid that easily undergoes sublimation. The compound is an example of a hypervalent sulfur compound called a sulfurane. As such, the sulfur adopts a see-saw...

in the periodic table.) Lower-period elements, however, may form hypervalent molecules, such as phosphorus pentafluoride or sulfur hexafluoride. The reactivity...

than predicted by the octet rule, as explained in the article on hypervalent molecules. The mechanisms of their reactions differ from organic compounds...

electronegativity of the two bonded atoms. Pauling also considered hypervalent molecules, in which main-group elements have apparent valences greater than...

Tetraethylammonium trichloride (also known as Mioskowski reagent) is a chemical compound with the formula [NEt4][Cl3] consisting of a tetraethylammonium...

bipyramidal structure, with D5h symmetry, as predicted by VSEPR theory. The molecule can undergo a pseudorotational rearrangement called the Bartell mechanism...

3 pm and S–Feq = 154.2 pm. It is typical for the axial ligands in hypervalent molecules to be bonded less strongly. The 19F NMR spectrum of SF4 reveals...

rearrangement 2,3-Wittig rearrangement Directed ortho metalation Ate complex Hypervalent molecule Potassium tetraphenylborate Awards Otto Hahn Prize for Chemistry...

Noury, S.; Silvi, B.; Gillespie, R. J. (2002). "Chemical Bonding in Hypervalent Molecules: Is the Octet Rule Relevant?" (PDF). Inorganic Chemistry. 41 (8):...

fundamental contributions in polymer science. Beta-lactam Carbene Hypervalent molecule Polyoxymethylene Pyrethrin Triphenylphosphine phenylimide Heidegger...

the phosphorus atom. Thus, the molecule is assumed to expand its bonding beyond the octet, a situation known as hypervalent bonding. LDQ theory, however...

bound to a bismuth atom with formula Bi(CH3)5. It is an example of a hypervalent compound. The molecular shape is trigonal bipyramid. Pentamethylbismuth...

discovered in 1934 by Denbigh and Whytlaw-Gray. Each sulfur atom of the S2F10 molecule is octahedral, and surrounded by five fluorine atoms and one sulfur atom...

of several studies, and a definite ground state remains uncertain. The molecule adopts a roughly square pyramidal shape in the unsolvated crystal. In crystals...

SeCl4 has often been used as an example for teaching VSEPR rules of hypervalent molecules. As such, one would predict four bonds but five electron groups...