-yl - definitie. Wat is -yl
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Wat (wie) is -yl - definitie

ATOM SET WHICH HAS REPLACED HYDROGEN ATOMS ON A HYDROCARBON'S PARENT CHAIN
Substituent group; Most substituted; -yl; Yl; -ylidene; -ylidyne; -ylylidene; -ylylidyne; -diyl; -diylidene; -triyl; -tetrayl; -ylidine; Ylidene; Ylidyne; Diyl; Triyl; Tetrayl; Ylylidene; Diylylidene; Ylylidyne; Ylidine; Substituents; Chemical substituent; R group (chemistry)

-yl         
¦ suffix Chemistry forming names of radicals: phenyl.
Origin
from Gk hule 'wood, material'.
-yl         
·- A suffix used as a characteristic termination of chemical radicals; as in ethyl, carbonyl, hydroxyl, ·etc.
Hypidone         
CHEMICAL COMPOUND
Hypidone hydrochloride; YL-0919; YL0919; YL 0919
Hypidone (developmental code name YL-0919) is an investigational serotonergic antidepressant which is under development for the treatment of major depressive disorder.

Wikipedia

Substituent

A substituent is one or a group of atoms that replaces (one or more) atoms, thereby becoming a moiety in the resultant (new) molecule. (In organic chemistry and biochemistry, the terms substituent and functional group, as well as side chain and pendant group, are used almost interchangeably to describe those branches from the parent structure, though certain distinctions are made in polymer chemistry. In polymers, side chains extend from the backbone structure. In proteins, side chains are attached to the alpha carbon atoms of the amino acid backbone.)

The suffix -yl is used when naming organic compounds that contain a single bond replacing one hydrogen; -ylidene and -ylidyne are used with double bonds and triple bonds, respectively. In addition, when naming hydrocarbons that contain a substituent, positional numbers are used to indicate which carbon atom the substituent attaches to when such information is needed to distinguish between isomers. Substituents can be a combination of the inductive effect and the mesomeric effect. Such effects are also described as electron-rich and electron withdrawing. Additional steric effects result from the volume occupied by a substituent.

The phrases most-substituted and least-substituted are frequently used to describe or compare molecules that are products of a chemical reaction. In this terminology, methane is used as a reference of comparison. Using methane as a reference, for each hydrogen atom that is replaced or "substituted" by something else, the molecule can be said to be more highly substituted. For example:

  • Markovnikov's rule predicts that the hydrogen atom is added to the carbon of the alkene functional group which has the greater number of hydrogen atoms (fewer alkyl substituents).
  • Zaitsev's rule predicts that the major reaction product is the alkene with the more highly substituted (more stable) double bond.
Voorbeelden uit tekstcorpus voor -yl
1. The patient, identified only as YL, has lived at the home since January last year when she was placed there by her local authority, Birmingham City Council.