divalent$22330$ - ορισμός. Τι είναι το divalent$22330$
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Τι (ποιος) είναι divalent$22330$ - ορισμός

ORGANIC MOLECULE CONTAINING A NEUTRAL CARBON WITH TWO UNBOUND VALENCE ELECTRONS
Carbenes; Divalent carbon; Dicovalent carbon
  • Methylene]] is the simplest carbene.

Dication         
  • The adamantane dication
DIVALENT POSITIVE ION
Dications; Divalent metal; Doubly charged cation
A dication is any cation, of general formula X2+, formed by the removal of two electrons from a neutral species.
Carbene         
In organic chemistry, a carbene is a molecule containing a neutral carbon atom with a valence of two and two unshared valence electrons. The general formula is or where the R represents substituents or hydrogen atoms.
divalent         
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MEASURE OF AN ELEMENT'S COMBINING CAPACITY WITH OTHER ATOMS WHEN IT FORMS CHEMICAL COMPOUNDS OR MOLECULES
Trivalent; Tetravalence; Trivalents; Tetravalents; Pentavalents; Zerovalent; Valence number; Valency number; Valency (chemistry); Divalent; Pentavalent; Combining capacity; Multivalency; Bivalent (chemistry); Hexavalent; Cations, divalent; Tetravalent; Valence (chemistry)/Table; Valency rules; Monovalent ion; Template:Valence table; Plurivalent; Periodic table (valence); Polyvalent ions; Tervalent; Quadrivalent; Heptavalent; Octavalent; Nonavalent; Decavalent; Nonvalent
[d??'ve?l(?)nt]
¦ adjective Chemistry having a valency of two.

Βικιπαίδεια

Carbene

In organic chemistry, a carbene is a molecule containing a neutral carbon atom with a valence of two and two unshared valence electrons. The general formula is R−:C−R' or R=C: where the R represents substituents or hydrogen atoms.

The term "carbene" may also refer to the specific compound :CH2, also called methylene, the parent hydride from which all other carbene compounds are formally derived. Carbenes are classified as either singlets or triplets, depending upon their electronic structure. Most carbenes are very short lived, although persistent carbenes are known. One well-studied carbene is dichlorocarbene Cl2C:, which can be generated in situ from chloroform and a strong base.