Molecular formula
C21H16O
81 compounds have this formula on CompoundList.
- Molar mass
- 284.36g/mol
- Monoisotopic mass
- 284.1201Da
- Atoms
- 38
- Elements
- 3
- Rings plus double bonds
- 14
The formula C21H16O describes a molecule made of 21 carbon atoms, 16 hydrogen 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 × 2188.70%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 165.67%1.008 × 16 = 16.128 g/mol
- O Oxygen × 15.63%15.999 × 1 = 15.999 g/mol
Look up another formula
Compounds with the formula C21H16O
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 81 of 81 compounds
1,1,3-Triphenyl-2-propyn-1-ol
CAS 1522-13-0C21H16O
1-(1,1'-Biphenyl)-4-YL-3-phenyl-2-propen-1-one
CAS 81878-54-8C21H16O
9H-Fluorene, 9-((4-methoxyphenyl)methylene)-
CAS 2871-87-6C21H16O
3,3-Diphenyl-1-indanone
CAS 55010-17-8C21H16O
2-(2-Naphthylmethylene)-alpha-tetralone
CAS 55723-88-1C21H16O
1,2-Dihydro-3-methylbenz(j)aceanthrylen-1-ol
CAS 3342-98-1C21H16O
Di-1-naphthylmethanol
CAS 62784-66-1C21H16O
1a,10,11,11c-Tetrahydro-9-methylbenz(7,8)aceanthryleno(9,10-b)oxirene
CAS 3416-21-5C21H16O
5-Phenyl-5H-dibenzo(A,D)cyclohepten-5-ol
CAS 55090-29-4C21H16O
1,2-Dihydro-3-methylbenz(j)aceanthrylen-2-ol
CAS 3308-64-3C21H16O
(Z)-1,2,3-Triphenylprop-2-en-1-one
CAS 7512-67-6C21H16O
3-Hydroxymethylcholanthrene
CAS 3343-05-3C21H16O
5-Methyl-2,3-diphenyl-1-benzofuran
CAS 6723-06-4C21H16O
2,4-Diphenyl-4H-chromene
CAS 53209-37-3C21H16O
Acrylophenone, 3,3-diphenyl-
CAS 849-01-4C21H16O
4-Phenylchalcone
CAS 2403-28-3C21H16O
2,2-Diphenyl-2H-chromene
CAS 4222-08-6C21H16O
11-Hydroxy-3-methylcholanthrene
CAS 3343-11-1C21H16O
![9,10[1',2']-Benzenoanthracene-9(10H)-methanol chemical structure, C21H16O, CAS 1469-57-4](/s/CQVGCHLOTZBAEO-UHFFFAOYSA-N.svg)
9,10[1',2']-Benzenoanthracene-9(10H)-methanol
CAS 1469-57-4C21H16O
1(2H)-Naphthalenone, 3,4-dihydro-2-(1-naphthalenylmethylene)-
CAS 55760-09-3C21H16O
4-Ethynyl-alpha,alpha-diphenylbenzenemethanol
CAS 136443-08-8C21H16O
6-Methyl-2,3-diphenyl-1-benzofuran
CAS 14770-90-2C21H16O
2,2-Diphenyl-2,3-dihydro-1H-inden-1-one
CAS 13740-67-5C21H16O
1,1'-Binaphthalene, 2-methoxy-
CAS 86596-61-4C21H16O
- Methanone, phenyl[4-(2-phenylethenyl)phenyl]-74685-66-8C21H16O
- 2,3,3-Triphenylacrylaldehyde25683-83-4C21H16O
- 7a,8a,9,10-Tetrahydro-7H-pyreno[1',2':5,6]cyclohepta[1,2-b]oxirene101030-77-7C21H16O
- 2,3-Diphenylindan-1-one7474-64-8C21H16O
- MCA epoxide12758-74-6C21H16O
- 4-(Benzo[3',4']cyclobuta[1',2':3,4]cyclobuta[1,2]benzen-4b(8bh)-yl)phenyl methyl ether6315-77-1C21H16O
- 3-(Anthracen-9-yl)phenyl methyl ether1038-72-8C21H16O
- 3,4-Diphenyl-1H-2-benzopyran54193-70-3C21H16O
- 10-Methyl-10-phenylphenanthren-9-one14619-96-6C21H16O
- 7-Oxiranyl-12-methylbenz(a)anthracene61695-77-0C21H16O
- 7-Methyl-7,8-dihydrobenzo(a)pyren-7-ol85206-95-7C21H16O
- Phenyl[4-(2-phenylethenyl)phenyl]methanoneC21H16O
- 11-Cholanthrenemethanol100895-53-2C21H16O
- Phenol, 4-(1,3-diphenyl-2-propynyl)-591245-74-8C21H16O
- 2H-1-Benzopyran, 2,4-diphenyl-58530-41-9C21H16O
- 2,5-Cyclohexadien-1-one, 4-(9H-fluoren-9-ylidene)-2,6-dimethyl-57196-35-7C21H16O
- 9-Methoxy-10-phenylanthracene17803-79-1C21H16O
- 2,3-Diphenyl-1H-inden-1-ol53347-50-5C21H16O
- 5-Methyl-1,3-diphenyl-2-benzofuran27720-46-3C21H16O
- 9-(Phenoxymethyl)anthracene16430-34-5C21H16O
- 9-(Benzyloxy)phenanthrene123689-51-0C21H16O
- 1 suppliers7,7-Dimethyl-7H-fluoreno[4,3-b]benzofuran1374677-48-1C21H16O
- Benzo(j)aceanthrylen-9-ol, 1,2-dihydro-6-methyl-111238-21-2C21H16O
- 1-Methoxy-4b-phenyl-4b,8b-dihydrobenzo[3',4']cyclobuta[1',2':3,4]cyclobuta[1,2]benzene6335-85-9C21H16O
- 2-Methoxy-8b-phenyl-4b,8b-dihydrobenzo[3',4']cyclobuta[1',2':3,4]cyclobuta[1,2]benzene6973-97-3C21H16O
- Benz(j)aceanthrylen-9-ol, 1,2-dihydro-3-methyl-3343-02-0C21H16O
- 9(10H)-Anthracenone, 10-(phenylmethyl)-16603-23-9C21H16O
- 3-(Antracen-9-yl)benzyl alcohol1349717-68-5C21H16O
- Benz(j)aceanthrylen-10-ol, 1,2-dihydro-3-methyl-3343-03-1C21H16O
- 7,7-Dimethyl-7H-fluoreno[2,3-b]benzofuran1414927-18-6C21H16O
- 9-(2-Methoxyphenyl)anthracene1232-27-5C21H16O
- Benz(j)aceanthrylene, 1,2-dihydro-9-methoxy-111238-15-4C21H16O
- (Anthracen-1-yl)(phenyl)methanol893616-24-5C21H16O
- (2Z)-2-(1-Naphthylmethylene)-3,4-dihydro-1(2H)-naphthalenoneC21H16O
- 2-(Benzyloxy)anthracene93245-49-9C21H16O
- 9-(4-Methoxyphenyl)anthracene23674-15-9C21H16O
- alpha-Phenyl-9-phenanthrenemethanol858856-85-6C21H16O
- Spiro[benzo[c]fluorene-7,1'-cyclopentan]-2'-one202325-68-6C21H16O
- 2-(Benzyloxy)-3'-ethynyl-1,1'-biphenyl2808120-92-3C21H16O
- (3-Methyl-9H-fluoren-2-yl)phenylmethanone18512-46-4C21H16O
- (1-Methyl-9H-fluoren-2-yl)phenylmethanone13906-92-8C21H16O
- 2-(Naphthalen-1-ylmethylene)-3,4-dihydronaphthalen-1(2H)-oneC21H16O
- 4-Methyl-3,6-diphenylbenzofuran197359-73-2C21H16O
- 4-(2,2-Diphenylvinyl)benzaldehyde17413-71-7C21H16O
- 2-Phenylspiro[cyclopropane-1,9'-xanthene]61327-91-1C21H16O
- 10-(4-Methylphenyl)anthracen-9(10H)-one127255-73-6C21H16O
- 9-(2-Methylphenoxy)anthracene89787-77-9C21H16O
- 1-(4-Ethenylphenyl)-3-(naphthalen-1-yl)prop-2-en-1-one54972-36-0C21H16O
- (9-Phenyl-9H-fluoren-9-yl)acetaldehyde5043-46-9C21H16O
- 1,5-Bis(2-ethynylphenyl)penta-1,4-dien-3-ol64432-81-1C21H16O
- (2'-Ethenyl[1,1'-biphenyl]-2-yl)(phenyl)methanone63104-68-7C21H16O
- 1,7-Diphenylnona-2,4,6-trien-8-YN-1-one61571-60-6C21H16O
- 9-(2-Methoxyphenyl)phenanthrene569674-06-2C21H16O
- 4-(Benzyloxy)-4'-ethynyl-1,1'-biphenyl1240591-71-2C21H16O
- 3-(Benzyloxy)-4'-ethynyl-1,1'-biphenyl3078342-12-5C21H16O
- 3'-Methoxy-1,2'-binaphthalene1809417-34-2C21H16O
- 2-(Benzyloxy)-3-ethynyl-1,1'-biphenyl3078432-47-7C21H16O
Frequently asked questions
What is the molar mass of C21H16O?
The molar mass of C21H16O is 284.36 g/mol, calculated from standard atomic weights for 21 carbon atoms, 16 hydrogen atoms and 1 oxygen atom. The monoisotopic mass is 284.1201 Da.
How many compounds have the formula C21H16O?
CompoundList lists 81 compounds with the molecular formula C21H16O, including 1,1,3-Triphenyl-2-propyn-1-ol, 1-(1,1'-Biphenyl)-4-YL-3-phenyl-2-propen-1-one, 9H-Fluorene, 9-((4-methoxyphenyl)methylene)-. 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 C21H16O?
C21H16O has a degree of unsaturation of 14. 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.