chemical bonding. In chemical bonding: Boranes …and some resembling spiderwebs (the arachno-boranes). Which type of structure is obtained correlates with the number of valence electrons in the molecule, and the correlation is expressed by Wade's rules.
Examples of nido and arachno- carboranes include 2,3-C 2 B 4 H 8 and 1,3-C 2 B 7 H 13, respectively. Geometrical isomers of carboranes can exist, necessitating the use of the numerical prefixes in a compound's name; this is illustrated by the 1,2-, 1,7-, and 1,2-C 2 B 10 H 12 icosahedral clusters referred to earlier.
Boranes is the name given to the class of synthetic hydrides of boron with generic formula BxHy. In the past, borane molecules were often labeled "electron-deficient" because of their multicenter bonding; this was done in order to distinguish such molecules from hydrocarbons and other classically bonded compounds. However, this usage is incorrect, as most boranes and related clusters such as …
cheminform abstract: is the closo, nido, or arachno classification for boranes a function of the topological description of the molecule.
…like untidy birds' nests (the nido-boranes), and some resembling spiderwebs (the arachno-boranes). Which type of structure is obtained correlates with the number of valence electrons in the molecule, and the correlation is expressed by Wade's rules.
Borane definition, any of the compounds, both neutral and anionic, of boron and hydrogen with formulas ranging from B2H6 to B20H16. See more.
boranes definition: Noun 1. plural form of borane . Yes, I'd like to receive Word of the Day emails from YourDictionary
Define Boranes. Boranes synonyms, Boranes pronunciation, Boranes translation, English dictionary definition of Boranes. n. 1. Any of a series of boron-hydrogen compounds, especially a reactive gaseous molecule, BH3, that is the simplest binary compound of boron and hydrogen..
Example sentences with "arachno-borane", translation memory Giga-fren The energies, geometries, and charge distributions of the closo-, nido-, and arachno - boranes and closo-carboranes are determined in SCF calculations using a contracted (9s,5p) basis set of Huzinaga, supplemented with polarization functions.
Borane update. Many of the boranes readily oxidise on contact with air, some violently. The parent member BH 3 is called borane, but it is known only in the gaseous state, and dimerises to form diborane, B 2 H 6. The larger boranes all consist of boron clusters that …