from The American Heritage® Dictionary of the English Language, 5th Edition.
- adjective Having more valences or bonds than the normal or expected number.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective chemistry having a higher than normal
from Wiktionary, Creative Commons Attribution/Share-Alike License
A series of logical steps, originally discussed as postings and comments to two blogs, led to the outcome described here of a central hypervalent atom bound on one face by a small cyclic carbon ligand, with the other free face having an interaction to a helium atom with the topological properties of a charge-shift rather than a covalent bond.
These nanoparticles are selectively oxidized by the hypervalent iodine species PhICl