Hydrocarbyl Moiety

1. The substituted hydrocarbyl moiety may possess a heteroatom (e.g. (Web site)

General

1. Those containing one heteroatom are, in general, stable. (Web site)

Examples

1. Examples of compounds comprising a heteroatom include silanes, ethers, sulfides, amines and the like. (Web site)

Preferred

1. Oxygen is preferred as heteroatom. (Web site)

Reactivity

1. The reactivity of partially unsaturated compounds depends on the relationship of the double bond and the heteroatom (e.g.

Halogenation

1. In the halogenation of carbon atoms alpha to a heteroatom, silanes are preferred compounds where the heteroatom is silicon. (Web site)

Hydrogen

1. The hydrogen must be attached to a strongly electronegative heteroatom, such as oxygen or nitrogen.
2. Internal alkynes have something other than hydrogen attached to the sp hybridized carbons, usually another carbon atom, but could be a heteroatom. (Web site)

Nitrogen Atom

1. Y represents a heterocyclic residue containing a nitrogen atom as a heteroatom. (Web site)

Heterocycle

1. The term "heterocycle" thus includes rings in which nitrogen is the heteroatom as well as partially and fully-saturated rings. (Web site)
2. In heterocyclic chemistry, organic reactions are classified by the type of heterocycle formed with respect to ring-size and type of heteroatom. (Web site)
3. It is important for the selectivity that the heterocycle is not linked to the linker via a carbonyl or heteroatom. (Web site)

Substituent

1. Moreover, polymerase recognition of the unnatural base pairs is found to be very sensitive to both the position and nature of the heteroatom substituent.
2. A heteroatom substituent on the silicon of arylsilacyclobutanes is important to enhance the reactivity. (Web site)
3. Nonetheless, either the aromatic heterocyclic or the aryl group may have at least one heteroatom in a substituent attached to the 4n+2 pi-electron ring. (Web site)

Compounds

1. The heteroatom of heterocyclic molecules is generally O,S, or N, but most often nitrogen, and the heterocyclics of live systems are compounds with nitrogen.

Carbon

1. Heteroatom In organic chemistry nomenclature, a heteroatom is any atom that is not carbon or hydrogen.
2. Typical cycloalkyl substituents have from 3 to 8 backbone (i.e., ring) atoms in which each backbone atom is either carbon or a heteroatom. (Web site)
3. For substituted heteroaryl groups, the substitution may be on a carbon or heteroatom. (Web site)

Carbonyl Carbon

1. This means that the heteroatom is bonded to a carbon atom in the position alpha, beta or gamma to the carbonyl carbon. (Web site)

Sulfur

1. The fused aromatic rings may comprise one or more hetero-aromatic rings, where the heteroatom may be nitrogen or sulfur, as illustrated by structure 10. (Web site)

Oxygen

1. The heteroatom of heterocyclic molecules is generally oxygen, sulfur, or nitrogen, with the latter being particularly common in biochemical systems. (Web site)
2. A heteroatom such as nitrogen, oxygen or sulfur may be included within the alkyl chain. (Web site)
3. A variant is the hetero-Diels-Alder, in which either the diene or the dienophile contains a heteroatom, most often nitrogen or oxygen. (Web site)

Aromaticity

1. Moreover, it is found that the substituent situation with respect to the heteroatom has a significant influence on the aromaticity.

Molecule

1. Additionally, for heterocycloalkyl, a heteroatom can occupy the position at which the heterocycle is attached to the remainder of the molecule.
2. Other atoms are known as heteroatom s and definite groups of atoms are called functional group s, as they give the molecule a function.

Electron Pair

1. Most nucleophilic groups comprise a heteroatom having an electron pair available for reaction with an electron deficient atom (electrophilic group). (Web site)

Hydrogen Atom

1. It may also refer to replacement of a hydrogen atom on a heteroatom (such as an amine hydrogen) with an alkyl, carbonyl or other carbon containing group. (Web site)
2. A "substituted hydrocarbyl group," as defined herein, is at least one carbon atom bonded to at least one heteroatom and to at least one hydrogen atom. (Web site)
3. The heteroatom (oxygen) stabilizes the formation of a free radical which is formed by the abstraction of a hydrogen atom by another free radical. (Web site)

Aromatic

1. T is a divalent alicyclic or aromatic ring group which may contain a heteroatom such as oxygen. (Web site)
2. The term “aromatic ring” as used herein embraces even an aromatic ring containing a heteroatom.
3. An activated carbon atom is defined as a carbon atom of an aromatic ring, a carbon atom alpha to an aromatic ring, or a carbon atom alpha to a heteroatom. (Web site)

Heterocyclic

1. The heteroatom may be a substituent of an atom that has pi bonds or may be in a heterocyclic ring. (Web site)
2. The heterocyclic ring may be attached at any heteroatom or carbon atom which results in the creation of a stable structure.

Furan

1. The dipole moment is 1.58 D. In contrast to furan and thiophene, the heteroatom represents the positive end of the dipole.

Sulfur Atom

1. The aromatic amine may have a heteroatom such as oxygen atom and sulfur atom in the aromatic ring. (Web site)

Nitrogen

1. A "heteroatom" is an atom other than carbon, such as oxygen, sulfur or nitrogen. (Web site)
2. H is a heteroatom selected from the group including sulfur, oxygen, nitrogen, or phosphorus.
3. The term "heteroaryl" as used herein refers to an aromatic ring system containing at least one heteroatom selected from nitrogen, oxygen, and sulfur. (Web site)

Carbon Atom

1. The heteroatom refers to an atom other than carbon atom and hydrogen atom. (Web site)
2. The heterocycle may be attached via any heteroatom or carbon atom. (Web site)
3. A heteroaryl group can be attached to the remainder of the molecule through a heteroatom or through a carbon atom and can contain 5 to 10 carbon atoms. (Web site)

Heteroatom

1. Each heteroaryl must contain at least one heteroatom (typically 1 to 5 heteroatoms) selected from the group consisting of nitrogen, oxygen and sulfur. (Web site)
2. In these compounds, at least one carbon atom is replaced by one of the heteroatom s oxygen, nitrogen, or sulfur. (Web site)
3. As used herein, "heteroatom" means a nitrogen, oxygen, or sulfur atom. (Web site)

Categories

1. Carbon Atom
2. Heteroatoms
3. Nature > Matter > Atoms > Nitrogen
4. Sulfur Atom
5. Heterocyclic
6. Books about "Heteroatom" in Amazon.com
   

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