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See searches and references containing METHINE GROUP!METHINE GROUP
Chemical group (=CH–)
In organic chemistry, a methine group or methine bridge is a trivalent functional group =CH−, derived formally from methane. It consists of a carbon atom
Methine_group
Type of dye
Methine dyes (polymethine dyes) are dyes whose chromophoric system consists of conjugated double bonds (polyenes) flanked by two end groups: an electron
Polymethine_dyes
Topics referred to by the same term
radical (a carbyne); CH• (or •CH), CH3• (or ⫶CH) The methylidyne group ≡CH The methine group (methanylylidene, methylylidene) =CH− Chomsky hierarchy, in computer
CH
Heterocyclic aromatic organic compound
chemical formula C5H5N. It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom (=N−). It is a highly flammable,
Pyridine
Class of chemical compounds
number of methine groups (CH) bound together by alternating single and double bonds. Compounds made up from an even number of methine groups are known
Polymethine
Atom set which has replaced hydrogen atoms on a hydrocarbon's parent chain
In organic chemistry, a substituent is one or a group of atoms that replaces (one or more) atoms, thereby becoming a moiety in the resultant (new) molecule
Substituent
Soluble chemical substance or natural material which can impart color to other materials
aromatic system. If one or more methine groups are replaced by nitrogen atoms, the dyes are referred to as aza-analog methine dyes. This gives rise to different
Dye
Production of peptides
condensation reaction of the carboxyl group of one amino acid to the amino group of another. Protecting group strategies are usually necessary to prevent
Peptide_synthesis
Chemical compound
barrel, with the staves being three ethylene units attached to two methine groups. It is the formal Diels–Alder adduct of benzene and acetylene. Due to
Barrelene
Chemical compound
final member of the azabenzene (azine) series, in which all of the methine groups of the benzene molecule have been replaced with nitrogen atoms. The
Hexazine
Chemical compound
shifts its probability across the methine group which enables the molecule to rotate along with the methine group, a photoisomerization reaction. This
YOYO-1
Organic molecule (C10H10)
is a cyclopropane platform with three vinylene arms conjoined at a methine group. This arrangement enables a degenerate Cope rearrangement with the result
Bullvalene
Chemical compound
prepared from bromoform. Methylene group Methylene bridge Methine group (methylylidene group, =CH-) Methylidyne group (≡CH) Henri A. Favre; Warren H. Powell
Methylidyne_radical
Group of atoms giving a molecule characteristic properties
functional group is any substituent or moiety in a molecule that causes the molecule's characteristic chemical reactions. The same functional group will undergo
Functional_group
Chemical group (–CH2–)
can easily be deprotonated to form a methylene group. Carbene Methyl group Methine "methylene (preferred IUPAC name" (PDF). "methylidene (preferred IUPAC
Methylene_group
Chemical group (R–C=O)
organyl group (R−C=O) or hydrogen in the case of formyl group (H−C=O). In organic chemistry, the acyl group (IUPAC name alkanoyl if the organyl group is alkyl)
Acyl_group
Chemical group (–CH=CH2)
In organic chemistry, a vinyl group (abbr. Vi; IUPAC name: ethenyl group) is a functional group with the formula −CH=CH2. It is the ethylene (IUPAC name:
Vinyl_group
Chemical group (≡CH)
Methylene group or methylidene =CH 2 Methylene bridge or methanediyl −CH 2− Methine group, methylylidene, or methanylylidene =CH− Methanetriyl group >CH− Methylylidyne
Methylidyne_group
Chemical compound
hydrogen. The four methyl groups (each at a methine chiral center), the structure's overall stereochemistry, and the N-methyl group all contribute to the
Kalkitoxin
Chemical group (>S(=O)2)
group is either a functional group found primarily in sulfones, or a substituent obtained from a sulfonic acid by the removal of the hydroxyl group,
Sulfonyl_group
Chemical group derived from alkanes (one hydrogen removed)
In organic chemistry, an alkyl group is an alkane missing one hydrogen atom. The term alkyl is intentionally unspecific to include many possible substitutions
Alkyl_group
Chemical group (–OH)
In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula −OH and composed of one oxygen atom covalently bonded to one
Hydroxy_group
Compound with carbon to copper bonds
geometry with the cyano group in cis orientation with respect to the cyclohexenyl methine group and anti-parallel to the methine proton. With other ligands
Organocopper_chemistry
Chemical group (R–O)
alkoxy group is an alkyl group which is singularly bonded to oxygen; thus R−O. Denoted usually with apostrophe('). The range of alkoxy groups is vast
Alkoxy_group
Chemical group (–CH2–CH3)
In organic chemistry, an ethyl group (abbreviated as ET, Et or et) is an alkyl substituent with the formula −CH2CH3, derived from ethane (C2H6). Ethyl
Ethyl_group
Chemical group (–CH3) derived from methane
In formulas, the group is often abbreviated as Me. This hydrocarbon group occurs in many organic compounds. It is a very stable group in most molecules
Methyl_group
Chemical group (–C(=O)C6H5
functional group with the formula −COC6H5 and structure −C(=O)−C6H5. It can be viewed as benzaldehyde missing one hydrogen. The benzoyl group has a mass
Benzoyl_group
Type of chemical compound
interconnected at their α carbon atoms via methine bridges (=CH−). In vertebrates, an essential member of the porphyrin group is heme, which is a component of hemoproteins
Porphyrin
Chemical compound
Pentyl is a five-carbon alkyl group or substituent with chemical formula −C5H11. It is the substituent form of the alkane pentane. In older literature
Pentyl_group
Chemical group (–OCH3)
organic chemistry, a methoxy group is the functional group consisting of a methyl group bound to oxygen. This alkoxy group has the formula R−O−CH3. On
Methoxy_group
Chemical group (–CH2–C6H5)
R−CH2−C6H5. Benzyl features a benzene ring (C6H6) attached to a methylene group (−CH2−). In IUPAC nomenclature, the prefix benzyl refers to a C6H5CH2 substituent
Benzyl_group
Organic compound containing a –C(=O)OH group
acid is a polar, organic acid that contains a carboxyl group (−C(=O)−OH) attached to an R-group. The general formula of a carboxylic acid is often written
Carboxylic_acid
Organic compounds of the form >C=O
a variety of carbon-containing substituents. Ketones contain a carbonyl group −C(=O)− (a carbon-oxygen double bond C=O). A ketone derived from an alkane
Ketone
Chemical compounds and groups containing nitrogen with a lone pair (:N)
when one or more hydrogen atoms in ammonia are replaced by alkyl or aryl groups. The nitrogen atom in an amine possesses a lone pair of electrons. Amines
Amine
Chemical group (–C4H9) derived from butane
organic chemistry, butyl is a four-carbon alkyl radical or substituent group with general chemical formula −C4H9, derived from either of the two isomers
Butyl_group
Cyclic chemical group (–C6H5)
In organic chemistry, the phenyl group, or phenyl ring, is a cyclic group of atoms with the formula C6H5−, and is often represented by the pseudoelement
Phenyl_group
Functional group (C=O)
In organic chemistry, a carbonyl group is a functional group with the formula C=O, composed of a carbon atom double-bonded to an oxygen atom, and it is
Carbonyl_group
Organic compound with an –S– group
sulfide (British English sulphide) or thioether is an organosulfur functional group with the connectivity R−S−R' as shown on right. Like many other sulfur-containing
Organic_sulfide
Organic compounds made of alkyl/aryl groups bound to oxygen (R–O–R')
compounds that contain an ether group, a single oxygen atom bonded to two separate carbon atoms, each part of an organyl group (e.g., alkyl or aryl). They
Ether
Chemical group (–OC(O)CH3)
In organic chemistry, the acetoxy group (abbr. AcO– or –OAc; IUPAC name: acetyloxy), is a functional group with the formula −OCOCH3 and the structure −O−C(=O)−CH3
Acetoxy_group
Chemical compound
colorless dimeric compounds consisting of two flavanol units linked by carboxy-methine bridge. This is followed by the formation of xanthylium salt yellowish
Compound_NJ2
Any organic compound having a sulfanyl group (–SH)
substituent. The −SH functional group itself is referred to as either a thiol group or a sulfhydryl group, or a sulfanyl group. Thiols are the sulfur analogue
Thiol
Chemical compound
Dimethinemerocyanines Zeromethinemerocyanines Berneth, Horst (2008). "Methine Dyes and Pigments". Ullmann's Encyclopedia of Industrial Chemistry. doi:10
Merocyanine
Chemical compound
highly symmetrical. Another difference is that its methine centers are occupied by phenyl groups. Budavari, Susan (1989). "7758. Porphine". The Merck
Porphine
Chemical group, –C(=O)CH3
group is called an ethanoyl group. An acetyl group contains a methyl group (−CH3) that is single-bonded to a carbonyl (C=O), making it an acyl group.
Acetyl_group
Organic compound containing the functional group R–CH=O
is an organic compound containing a functional group with the structure R−CH=O. The functional group itself (without the "R" side chain) can be referred
Aldehyde
Functional group consisting of sulfur double-bonded to oxygen
The thionyl group is SO, a sulfur atom plus an oxygen atom. It occurs in compounds such as thionyl fluoride, SOF2. Thionyl chloride, SOCl2, is a common
Thionyl_group
Organic compound
chemical formula CO(NH2)2. This amide has two amino groups (−NH2) joined by a carbonyl functional group (−C(=O)−). It is thus the simplest amide of carbamic
Urea
replacement of the methanone linking group with an ethanone, carboxamide, carboxylate, methylene bridge or methine group; replacement of the 1-naphthyl ring
Structural scheduling of synthetic cannabinoids
Structural_scheduling_of_synthetic_cannabinoids
Chemical group (–CH2–CH=CH2)
an allyl group is a substituent with the structural formula −CH2−HC=CH2. It consists of a methylene bridge (−CH2−) attached to a vinyl group (−CH=CH2)
Allyl_group
Free radical
·CH=CH–CH3 and 2-propenyl (isopropenyl) has the formula CH2=(C·)–CH3. These groups are found in many compounds. Propenyl compounds are isomeric with allyl
Propenyl_group
Chemical compounds with the structure R–O–O–R'
Peroxides are a group of molecules with the structure R−O−O−R, where each R represents a radical (a portion of a complete molecule; not a free radical)
Peroxide
A crotyl group is an organic functional group with the formula RCH2CH=CHCH3. Systematically, it is called a but-2-en-1-yl group and exhibits geometric
Crotyl_group
Organic compound containing an –NO2 group
contain one or more nitro functional groups (−NO2). The nitro group is one of the most common explosophores (functional group that makes a compound explosive)
Nitro_compound
Molecule with a ring of bonded atoms
organic compound, methine hydrogen atoms implied, not shown (aromatic). Pyridine, a 6 membered heterocyclic organic compound, methine hydrogen atoms implied
Cyclic_compound
Organic compounds with the structure R–S(=O)2–OH
alkyl or aryl group and the S(=O)2(OH) group a sulfonyl hydroxide. A sulfonic acid can be thought of as sulfuric acid with one hydroxyl group replaced by
Sulfonic_acid
Chemical group (–N=C=O)
chemistry, isocyanate is the functional group with the formula R−N=C=O. Organic compounds that contain an isocyanate group are referred to as isocyanates. An
Isocyanate
Chemical group (–C3H7) derived from propane
In organic chemistry, a propyl group is a three-carbon alkyl substituent with chemical formula −CH2CH2CH3 for the linear form. This substituent form is
Propyl_group
Organic compounds with a diazenyl group (–N=N–)
compounds bearing the functional group diazenyl (R−N=N−R′, in which N is nitrogen and R and R′ can be either aryl or alkyl groups). IUPAC defines azo compounds
Azo_compound
Chemical compound
of 5 with nitric acid to 6. A strong base would be able to abstract the methine proton of the nitrated triphenylmethyl compound if present, forming a strongly
Tetraphenylmethane
Organic compounds of the form RC(=O)NR′R″
where R, R', and R″ represent any group, typically organyl groups or hydrogen atoms. The amide functional group plays an important role in the chemistry
Amide
Class of dyes
special cyanine dyes are synthesized from 2, 3, 5 or 7-methine structures with reactive groups on either one or both of the nitrogen ends so that they
Cyanine
Chemical compound
at the following respective positions: c2,c3-c7,c8-c12,c13-c17,c18. The methine bridges of PPIX are named alpha (c5), beta (c10), gamma (c15), and delta
Protoporphyrin_IX
Organic compound containing a sulfinyl group (>SO)
compound containing a sulfinyl (>SO) functional group attached to two carbon atoms. It is a polar functional group. Sulfoxides are oxidized derivatives of sulfides
Sulfoxide
Organic compounds with a carbon-carbon-oxygen ring
nonpolar, and often volatile. A compound containing the epoxide functional group can be called an epoxy, epoxide, oxirane, and ethoxyline. Simple epoxides
Epoxide
Class of chemical compounds
In organic chemistry, an imide is a functional group consisting of two acyl groups bound to nitrogen. The compounds are structurally related to acid anhydrides
Imide
Chemical compound
4-formylquinoline [wd]. Quinaldine, the isomer with the methyl group in position 2. Quinoline Berneth, Horst (2008). "Methine Dyes and Pigments". Ullmann's Encyclopedia of
Lepidine
Chemical compound
derivative of adamantane with a bromine atom at one of the four equivalent methine positions. Although of no commercial value, 1-bromoadamantane has often
1-Bromoadamantane
Any chemical compound having two acyl groups bonded to the same oxygen atom
an organic compound. An acid anhydride is a compound that has two acyl groups bonded to the same oxygen atom. A common type of organic acid anhydride
Organic_acid_anhydride
Hydrocarbon compound (H2C=CH2)
"oxychlorination", i.e. chlorine itself is not used. Some products derived from this group are polyvinyl chloride, trichloroethylene, perchloroethylene, methyl chloroform
Ethylene
Hydrocarbon compound containing one or more C=C bonds
bonds. Acyclic alkenes, with only one double bond and no other functional groups (also known as mono-enes) form a homologous series of hydrocarbons with
Alkene
Chemical compound containing carbon and at least one halogen
more halogen atoms (fluorine, chlorine, bromine, iodine, or astatine – group 17) resulting in the formation of organofluorine compounds, organochlorine
Halocarbon
Compound derived from an acid
acidic hydroxyl group (−OH) of that acid is replaced by an organyl group (R′). These compounds contain a distinctive functional group. Analogues derived
Ester
Chemical compound
272–280. doi:10.1021/jacs.8b09653. ISSN 0002-7863. Berneth, Horst (2008), "Methine Dyes and Pigments", Ullmann's Encyclopedia of Industrial Chemistry, doi:10
Benzimidazole
Chemical compound
esters of maleic acid undergo the Michael reaction with active methylene or methine compounds such as malonate or acetoacetate esters in the presence of sodium
Maleic_anhydride
Class of functional groups with a –N=O group attached
refers to a functional group in which the nitric oxide (−N=O) group is attached to an organic moiety. As such, various nitroso groups can be categorized as
Nitroso
Class of chemical compounds
Selenols are organic compounds that contain the functional group with the connectivity C−Se−H. Selenols are sometimes also called selenomercaptans and
Selenol
hydroxyl group. Methylarsonic acid results when the substituent is a methyl group. Phenylarsonic acid results when the substituent is a phenyl group. The
Arsonic acid (functional group)
Arsonic_acid_(functional_group)
Organic compound or functional group containing a C=N bond
functional group or organic compound containing a carbon–nitrogen double bond (C=N). The nitrogen atom can be attached to a hydrogen or an organic group (R)
Imine
Chemical reaction
C.; Oguri, M.; Itô, S. (1996). "Mitsunobu-type alkylation with active methine compounds". Tetrahedron Letters. 37 (14): 2459–2462. doi:10.1016/0040-4039(96)00318-8
Mitsunobu_reaction
Organic compounds of the form >C=N–OH
side-chain and R' may be hydrogen, forming an aldoxime, or another organic group, forming a ketoxime. O-substituted oximes form a closely related family
Oxime
Organic compound with a –C≡N functional group
chemistry, a nitrile is any organic compound that has a −C≡N functional group. The name of the compound is composed of a base, which includes the carbon
Nitrile
Organic compound with at least one hydroxyl (–OH) group
of organic compound that carries at least one hydroxyl (−OH) functional group bound to a saturated carbon atom. Alcohols range from the simple, like methanol
Alcohol_(chemistry)
Functional group with the chemical structure R–S–S–R′
disulphide in British English) is a compound containing a R−S−S−R′ functional group or the S2−2 anion. In inorganic chemistry, the anion appears in the common
Disulfide
Organic compound with the structure >C(O–)2
organic chemistry, an acetal is a functional group with the connectivity R2C(OR')2. Here, the R groups can be organic fragments (a carbon atom, with
Acetal
Reaction(s) leading to production of (phospho)lipid peroxides
(OH•) abstracts the hydrogen at the allylic position (–CH2–CH=CH2) or methine bridge (=CH−)[clarification needed] on the stable lipid substrate, typically
Lipid_peroxidation
compound with the functional group RnE(=O)xNR2, where x is not zero, E is some element, and each R represents an organic group or hydrogen. It is a derivative
Amide_(functional_group)
Anion with formula OCN and charge –1
functional group, −O−C≡N, are known as cyanates or cyanate esters. The cyanate functional group is distinct from the isocyanate functional group, −N=C=O;
Cyanate
Chemical compound
Bibcode:2014RSCAd...460176P. doi:10.1039/C4RA07437H. Berneth, Horst (2008). "Methine Dyes and Pigments". Ullmann's Encyclopedia of Industrial Chemistry. doi:10
2-Aminobenzothiazole
Compound containing rings with delocalized pi electrons
Heteroarenes are aromatic compounds, where at least one methine or vinylene (-C= or -CH=CH-) group is replaced by a heteroatom: oxygen, nitrogen (azaarenes)
Aromatic_compound
Red pigment of the bile
the bilin's parent compound was protoporphyrin IX cleaved at the alpha-methine bridge (see protoporphyrin IX nomenclature). Origins pertaining to the
Bilirubin
Organosulfur compounds containing –S(=O)2–N< functional group
sulfonamide functional group (also spelled sulphonamide) is an organosulfur group with the structure R−S(=O)2−NR2. It consists of a sulfonyl group (O=S=O) connected
Sulfonamide
Class of chemical compounds
where R stands for any group, typically organic, which contain the hydroperoxy (also known as perhydroxyl) functional group (−OOH). Hydroperoxide also
Hydroperoxide
Organosulfur compounds of the form R–SC(=O)–R′
derivatives of coenzyme A, e.g., acetyl-CoA. The R and R' represent organyl groups, or H in the case of R. One route to thioesters involves the reaction of
Thioester
Table listing infrared absorption peaks for various bonds
reported in wavenumber, for common types of molecular bonds and functional groups. In physical and analytical chemistry, infrared spectroscopy (IR spectroscopy)
Infrared spectroscopy correlation table
Infrared_spectroscopy_correlation_table
Group of synthetic dyes
water pollution Disperse Blue 35 12222-75-2 Allergy risk Disperse Blue 74 Methine dyes Disperse Blue 79 Aqueous toxicity Disperse Blue 102 12222-97-8 Allergy
Disperse_blue_dye
Organic compounds of the form R–O–N=O
alkyl nitrites are a group of organic compounds based upon the molecular structure R−O−N=O, where R represents an alkyl group. Formally they are alkyl
Alkyl_nitrite
Chemical compound with the group –N+≡C–
group –N+≡C−. It is the isomer of the related nitrile (–C≡N), hence the prefix is isocyano. The organic fragment is connected to the isocyanide group
Isocyanide
Organic compounds with the structure >C=S
which is reflected by the prefix "thio-" in the name of the functional group. Thus the simplest thioketone is thioacetone, the sulfur analog of acetone
Thioketone
Group of chemical compounds derived from alkanes containing one or more halogens
have the general formula "RX" where R is an alkyl or substituted alkyl group and X is a halogen (F, Cl, Br, I). Haloalkanes have been known for centuries
Haloalkane
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