The [C.sub.1]-[C.sub.2] bond is part of a conjugated system and has a bond length of 1.40 A at the beginning of the simulation; its elongation to about 1.5 A after the laser pulse was applied suggests conversion to a single bond
. Meanwhile, the [C.sub.7]-[C.sub.8] bond length remains essentially constant, suggesting that the ethylene molecule remains in the ground state; only the benzene molecule is affected by the laser pulse.
(1) Topological descriptors include number of single bonds
, number of oxygen atoms, relative number of oxygen atoms, number of nitrogen atoms, relative number of nitrogen atoms, and number of aromatic bonds .
They cover synthetic design, stereochemical considerations in planning synthesis, the concept of protecting functional groups, oxidation and reduction as functional group transformations, the chemistry of carbon-carbon pi-bonds and related reactions, formation of carbon-carbon single bonds
through enolate anions and organometallic reagents, formation of carbon-carbon pi-bonds, and synthesis of carbocyclic systems.
A fatty acid that has all carbon atoms attached to each other with single bonds
and the maximum number of hydrogen atoms attached to every carbon atom is said to be saturated with hydrogen atoms and is referred to as a saturated fatty acid.
A diamond consists of carbon atoms bonded by tetrahedral carbon--carbon single bonds
. In contrast, plastics usually consist of polymer chains with carbon-carbon backbones.
The experiment is an adaptation of the Mannich reaction, which is a useful way to form C-C single bonds
between two molecules.
What if nitrogen formed single bonds
in which it alternated with another element?
The spectra reveal a plethora of conformational isomers, differing solely by rotation about the C-C single bonds
. Comparisons of the experimental data show significant discrepancies with computational chemistry models.
Such a ring must have single bonds
and double bonds in alternation.
Underperforming dynamics was demonstrated by single bonds
in the banking sector, including subordinated Eurobonds of NOMOS-BANK that posted a 0.25% fall.
How can it have two single bonds
with only one electron?