- In chemistry, the
valence (US spelling) or
valency (British spelling) of an atom is a
measure of its
combining capacity with
other atoms when it forms...
- This
theory proceeds from the idea of
atomic valence,
especially the
tetravalence of
carbon (which Kekulé
announced late in 1857) and the
ability of carbon...
- out the
concept of
hybridization of
atomic orbitals and
analyzed the
tetravalency of the
carbon atom. At Caltech,
Pauling struck up a
close friendship...
- 5° and the
dodecahedral angle is 108°, only a
slight discrepancy. The
tetravalency (4-connectedness) of
carbon excludes an
icosahedron because 5
edges meet...
- Kekulé
proposing the same concept. (Kekulé had
already proposed the
tetravalence of
carbon in 1857.) However,
through a
misunderstanding with Wurtz, Kekulé's...
-
Archibald Scott Couper (1831–1892),
English chemist,
further developed Tetravalence James Crafts (1839–1917),
American chemist,
developer of Friedel–Crafts...
-
along with the
discovery of benzene’s
structure (1858) and carbon’s
tetravalency(1865), this
science built the
groundwork for
modern organic chemistry...
- in 1852 and
August Kekulé in 1857
introduced valence theory with the
tetravalency of
carbon as its
central theme,
making trivalent carbon obsolete for...
-
isomers are
possible for R2S2O2, at
least restricting sulfur to di- and
tetravalency: (RO)2S=S, ROSSOR, RS(O)2SR, and RS(O)SOR. For the
first two, the R groups...
-
Although the
apical carbon atom is hexacoordinated, the rule of the
tetravalency of
carbon is
still fulfilled.
While the C-CH3 bond
length of 1.479(3)...
