Molecular formula
C21H16N2O
99 compounds have this formula on CompoundList.
- Molar mass
- 312.37g/mol
- Monoisotopic mass
- 312.1263Da
- Atoms
- 40
- Elements
- 4
- Rings plus double bonds
- 15
The formula C21H16N2O describes a molecule made of 21 carbon atoms, 16 hydrogen atoms, 2 nitrogen atoms and 1 oxygen atom. It is written in Hill notation: carbon first, then hydrogen, then the other elements in alphabetical order. The formula tells you which atoms are present, not how they are connected, which is why several different chemicals can share it.
Elemental composition
- C Carbon × 2180.75%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 165.16%1.008 × 16 = 16.128 g/mol
- N Nitrogen × 28.97%14.007 × 2 = 28.014 g/mol
- O Oxygen × 15.12%15.999 × 1 = 15.999 g/mol
Look up another formula
Compounds with the formula C21H16N2O
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 99 of 99 compounds
4-(4,5-Diphenyl-1H-imidazol-2-yl)phenol (for Biochemical Research)
CAS 1752-94-9C21H16N2O
2-(4-Methoxy-phenyl)-3-phenyl-quinoxaline
CAS 10166-78-6C21H16N2O
2-(4,5-Diphenyl-1H-imidazol-2-yl)-phenol
CAS 14691-35-1C21H16N2O
1-(2,3-Dihydro-1H-perimidin-2-yl)naphthalen-2-ol
CAS 307330-28-5C21H16N2O
1,3-Bis(1-naphthyl)urea
CAS 607-56-7C21H16N2O
2-Benzyl-4-phenylphthalazin-1(2H)-one
CAS 3306-73-8C21H16N2O
2-Benzyl-3-phenylquinazolin-4(3H)-one
CAS 19857-34-2C21H16N2O
2-Methyl-3-(4-phenylphenyl)quinazolin-4-one
CAS 424803-68-9C21H16N2O
3-Benzyl-2-phenylquinazolin-4(3H)-one
CAS 19857-37-5C21H16N2O
2-Benzhydryl-5-phenyl-1,3,4-oxadiazole
CAS 58004-74-3C21H16N2O
2-(2-Methoxyphenyl)-3-phenylquinoxaline
CAS 10166-77-5C21H16N2O
4'-(9-Fluorenylideneamino)acetanilide
CAS 102241-24-7C21H16N2O
N-Benzyl-4-cyano-N-phenylbenzamide
CAS 852909-15-0C21H16N2O
Acetophenone, 4'-(9-acridinylamino)-
CAS 73655-62-6C21H16N2O
1-(4-Methylphenoxy)-4-phenylphthalazine
CAS 76972-44-6C21H16N2O
Bis(4-phenyl-1H-pyrrol-3-yl)methanone
CAS 833458-05-2C21H16N2O
1-Benzyl-3-phenyliminoindol-2-one
CAS 1369382-19-3C21H16N2O
![3-[(4-Methylphenyl)methoxy]pyrido[1,2-a]indole-10-carbonitrile chemical structure, C21H16N2O, CAS 478247-95-9](/s/WGKDGYPEAYWQHO-UHFFFAOYSA-N.svg)
3-[(4-Methylphenyl)methoxy]pyrido[1,2-a]indole-10-carbonitrile
CAS 478247-95-9C21H16N2O
4-(Phenylethynyl)-N-(pyridin-3-ylmethyl)benzamide
CAS 352659-97-3C21H16N2O
6-Methoxy-2,3-diphenylquinoxaline
CAS 26832-42-8C21H16N2O
![2-Amino-4-(4-methylphenyl)-4H-benzo[h]chromene-3-carbonitrile chemical structure, C21H16N2O, CAS 144464-54-0](/s/VOWWIDJXXXPMDR-UHFFFAOYSA-N.svg)
2-Amino-4-(4-methylphenyl)-4H-benzo[h]chromene-3-carbonitrile
CAS 144464-54-0C21H16N2O
3-(4,5-Diphenyl-1H-imidazol-2-yl)phenol
CAS 95815-86-4C21H16N2O
(3Z)-1-Benzyl-3-(2-pyridylmethylene)indolin-2-one
CAS 25791-28-0C21H16N2O
N-(4-Phenoxyphenyl)quinolin-4-amine
CAS 179248-81-8C21H16N2O
- 1,4,5-Triphenyl-1,3-dihydro-2H-imidazol-2-one26497-68-7C21H16N2O
- 4-Benzyl-2-phenylphthalazin-1(2H)-one37740-35-5C21H16N2O
- 2-(4-Phenyl-3H-1,5-benzodiazepin-2-yl)phenol41458-53-1C21H16N2O
- RefChem:38143457709-75-8C21H16N2O
- 4(3H)-Quinazolinone, 3-(4-methylphenyl)-2-phenyl-37856-14-7C21H16N2O
- (4Z)-5-Methyl-4-(naphthalen-1-ylmethylidene)-2-phenylpyrazol-3-one1453187-57-9C21H16N2O
- 4-(2,5-Diphenyl-1,2-dihydro-3H-pyrazol-3-ylidene)cyclohexa-2,5-dien-1-one81963-71-5C21H16N2O
- 2-[(1-Prop-2-ynylbenzimidazol-2-yl)methoxy]naphthalene876883-24-8C21H16N2O
- [(1-Prop-2-ynylbenzimidazol-2-yl)methoxy]naphthalene876883-28-2C21H16N2O
- (3AR,8aS)-2-(6-phenylpyridin-2-yl)-3a,8a-dihydro-8H-indeno[1,2-d]oxazole2757082-60-1C21H16N2O
- Urea, N,N-di-2-naphthalenyl-33102-63-5C21H16N2O
- 3-(3-Methylphenyl)imino-1-phenylindol-2-one303984-60-3C21H16N2O
- Methanone, (3,5-diaminophenyl)(4-(phenylethynyl)phenyl)-188479-24-5C21H16N2O
- 8H-Dibenz(b,f)isoxazolo(4,5-d)azepine, 3a,12b-dihydro-3-phenyl-85008-74-8C21H16N2O
- 4-(2-Phenylethynyl)-N-(pyridin-4-ylmethyl)benzamide423151-70-6C21H16N2O
- 3-[(4-Methylphenyl)imino]-1-phenyl-1,3-dihydro-2H-indol-2-one303984-52-3C21H16N2O
- 1-Benzyl-4-phenoxyphthalazine155937-32-9C21H16N2O
- 2-Methyl-4-(4-methylphenyl)-5-oxo-4,5-dihydro-1H-indeno[1,2-b]pyridine-3-carbonitrile383147-38-4C21H16N2O
- 12,13-Dihydro-11H-10b,13a-diazabenzo[2,3]azuleno[7,8,1-lma]fluoren-12-ol904816-98-4C21H16N2O
- (10Z)-11-(4-Methylphenyl)-2,10-diazatricyclo[10.4.0.0^{4,9}]hexadeca-1(16),4(9),5,7,10,12,14-heptaen-3-one1798341-87-3C21H16N2O
- 4-(9H-Fluoren-9-ylidenemethyl)-N-methyl-n-nitrosoaniline16802-64-5C21H16N2O
- 4-Amino-N-phenanthren-2-ylbenzamide7512-30-3C21H16N2O
- N-(Fluoren-9-ylideneamino)-2-phenylacetamide5404-96-6C21H16N2O
- 5-Benzhydryl-3-phenyl-1,2,4-oxadiazole380551-15-5C21H16N2O
- N-([1,1'-Biphenyl]-4-yl)-1H-indole-3-carboxamide930964-79-7C21H16N2O
- (3aS,8aR)-2-(6-Phenylpyridin-2-yl)-8,8a-dihydro-3aH-indeno[1,2-d]oxazole2634687-79-7C21H16N2O
- (E)-N-Benzyl-2-cyano-3-naphthalen-1-ylprop-2-enamide345368-12-9C21H16N2O
- 2-Biphenyl-4-yl-8-methylimidazo[1,2-a]pyridine-3-carbaldehyde524724-71-8C21H16N2O
- Benzamide, N-(4-acridinylmethyl)-33258-96-7C21H16N2O
- (7-Methyl-2-phenylpyrazolo[1,5-a]pyridin-3-yl)phenyl ketone17408-40-1C21H16N2O
- (E)-2-Cyano-N-(2-methylphenyl)-3-naphthalen-1-ylprop-2-enamide345258-21-1C21H16N2O
- 2-Amino-4-(4-methylphenyl)-4H-benzo[g]chromene-3-carbonitrile861208-30-2C21H16N2O
- 1,4,5-Triphenyl-1,2-dihydro-3H-pyrazol-3-one5022-92-4C21H16N2O
- 1,3,4-Triphenyl-1,3-dihydro-2H-imidazol-2-one71624-07-2C21H16N2O
- 4-((4-Phenylphthalazin-1-yl)methyl)phenol945599-41-7C21H16N2O
- 3-(3-Methylphenyl)-5-(2-phenylphenyl)-1,2,4-oxadiazole695158-17-9C21H16N2O
- 2-([1,1'-Biphenyl]-4-yl)-7-methylimidazo[1,2-a]pyridine-3-carbaldehyde727652-10-0C21H16N2O
- 9H-Carbazole, 3-(2-benzoxazolyl)-9-ethyl-173463-47-3C21H16N2O
- Phenol, 3-[5-(2-naphthalenylamino)-3-pyridinyl]-821784-42-3C21H16N2O
- N-(2-(1H-Indol-2-yl)phenyl)benzamide58995-87-2C21H16N2O
- [4-(3-Phenyl-1,7-naphthyridin-2-yl)phenyl]methanol893424-02-7C21H16N2O
- [4-(3-Phenyl-1,6-naphthyridin-2-yl)phenyl]methanol893423-82-0C21H16N2O
- (Z)-N-Benzyl-2-cyano-3-naphthalen-2-ylprop-2-enamide891080-55-0C21H16N2O
- N-(2-Methylnaphthalen-1-yl)isoquinoline-1-carboxamide2809369-03-5C21H16N2O
- N-(5H-Indeno[1,2-b]pyridin-5-ylidenemethyl)-N-(4-methoxybenzylidene)amine340024-59-1C21H16N2O
- 3-Benzhydrylquinazolin-4-one708998-11-2C21H16N2O
- 1,8-Naphthyridin-2(1H)-one, 4-phenyl-1-(phenylmethyl)-178548-28-2C21H16N2O
- 5H-Benzo[f]pyrano[2,3-h]quinoxaline, 6,7-dihydro-7-phenyl-833122-46-6C21H16N2O
- 2-Phenyl-1-(p-tolyl)quinazolin-4(1H)-one58217-26-8C21H16N2O
- 1-Benzyl-2-phenylquinazolin-4(1H)-one66866-31-7C21H16N2O
- (1,6-Naphthyridin-5-yl)(diphenyl)methanol74048-25-2C21H16N2O
- 2,3-Diphenyl-1H-indole-1-carboxamide112217-92-2C21H16N2O
- 1-(4,6-Diphenyl-1H-pyrrolo[2,3-B]pyridin-2-yl)ethanone1159982-20-3C21H16N2O
- 2-(5-([1,1'-Biphenyl]-4-yl)oxazol-2-yl)aniline83959-84-6C21H16N2O
- 3-(5-([1,1'-Biphenyl]-4-yl)oxazol-2-yl)aniline83959-77-7C21H16N2O
- 4-[5-([1,1'-Biphenyl]-4-yl)-1,3-oxazol-2-yl]aniline83959-67-5C21H16N2O
- 2-Benzyl-5-(naphthalen-2-yl)pyridazin-3(2H)-one2095561-17-2C21H16N2O
- Isoxazolo[5,4-b]pyridine, 3-methyl-4-phenyl-6-(2-phenylethenyl)-1383625-31-7C21H16N2O
- 2-Benzyl-N-(4-carbonitrilphenyl)benzamide871264-53-8C21H16N2O
- N-[Cyano(phenyl)methyl]-N-phenylbenzamide14062-91-0C21H16N2O
- 4-Methoxy-6-methyl-1-(4-methylphenyl)naphthalene-2,3-dicarbonitrile79781-47-8C21H16N2O
- 1-Benzyl-4-phenylquinazolin-2(1H)-one107289-00-9C21H16N2O
- (2Z)-N,3,4-Triphenyl-1,3-oxazol-2(3H)-imine69339-31-7C21H16N2O
- 4-[(4-Phenylisoquinolin-1-yl)amino]phenol1071541-75-7C21H16N2O
- N-[(2,3-Diphenyl-1H-indol-1-yl)methylidene]hydroxylamine89725-86-0C21H16N2O
- 4-Benzylidene-3-phenyl-3,4-dihydrophthalazin-1(2H)-one62142-42-1C21H16N2O
- 4,5,5-Triphenyl-1,5-dihydro-2H-imidazol-2-one88090-58-8C21H16N2O
- 2-(1-Phenoxy-2-phenylethenyl)-1H-benzimidazole120162-92-7C21H16N2O
- 6-(1,5-Diphenyl-1,2-dihydro-3H-pyrazol-3-ylidene)cyclohexa-2,4-dien-1-one19726-10-4C21H16N2O
- 6-{[(3-Phenyl-1H-indol-1-yl)amino]methylidene}cyclohexa-2,4-dien-1-one62308-66-1C21H16N2O
- 4-{[(3-Phenyl-1H-indol-1-yl)amino]methylidene}cyclohexa-2,5-dien-1-one62308-65-0C21H16N2O
- (Z)-2-Cyano-3-(4-methylphenyl)-N-naphthalen-1-ylprop-2-enamide358771-19-4C21H16N2O
- N-(6-Methylphenanthridin-8-yl)benzamide861814-97-3C21H16N2O
- (3aS,8aR)-5-Phenyl-2-(pyridin-2-yl)-8,8a-dihydro-3aH-indeno[1,2-d]oxazole2197167-89-6C21H16N2O
- 1-[4-(1-Phenyl-1H-benzimidazol-2-yl)phenyl]ethanone2713563-88-1C21H16N2O
Frequently asked questions
What is the molar mass of C21H16N2O?
The molar mass of C21H16N2O is 312.37 g/mol, calculated from standard atomic weights for 21 carbon atoms, 16 hydrogen atoms, 2 nitrogen atoms and 1 oxygen atom. The monoisotopic mass is 312.1263 Da.
How many compounds have the formula C21H16N2O?
CompoundList lists 99 compounds with the molecular formula C21H16N2O, including 4-(4,5-Diphenyl-1H-imidazol-2-yl)phenol (for Biochemical Research), 2-(4-Methoxy-phenyl)-3-phenyl-quinoxaline, 2-(4,5-Diphenyl-1H-imidazol-2-yl)-phenol. Compounds that share a formula are isomers. They contain the same atoms arranged differently, so their properties, uses and prices can be very different.
What is the degree of unsaturation of C21H16N2O?
C21H16N2O has a degree of unsaturation of 15. That is the total number of rings and pi bonds (a double bond counts as one, a triple bond as two) in any structure with this formula.