C21H20O
57 compounds have this formula on CompoundList.
- Molar mass
- 288.39g/mol
- Monoisotopic mass
- 288.1514Da
- Atoms
- 42
- Elements
- 3
- Rings plus double bonds
- 12
The formula C21H20O describes a molecule made of 21 carbon atoms, 20 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 × 2187.46%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 206.99%1.008 × 20 = 20.160 g/mol
- O Oxygen × 15.55%15.999 × 1 = 15.999 g/mol
Compounds with the formula C21H20O
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 57 of 57 compounds
![Cyclohexanone, 2-[(4-methylphenyl)methylene]-6-(phenylmethylene)- chemical structure, C21H20O, CAS 57083-25-7](/s/XDIRNKKHCXQCNK-UHFFFAOYSA-N.svg)
![2,4-Diphenylbicyclo[3.3.1]non-2-en-9-one chemical structure, C21H20O, CAS 16643-41-7](/s/ZONFECJLZRPDKO-UHFFFAOYSA-N.svg)
![11-Butyl-15,16-dihydrocyclopenta[a]phenanthren-17-one chemical structure, C21H20O, CAS 63642-51-3](/s/PHNBIKOXNVNWNV-UHFFFAOYSA-N.svg)
![1,1'-[(4-Ethoxyphenyl)methylene]dibenzene chemical structure, C21H20O, CAS 62345-31-7](/s/APRHYPRARIPIGG-UHFFFAOYSA-N.svg)
![1,1'-[2-(4-Methoxyphenyl)ethane-1,1-diyl]dibenzene chemical structure, C21H20O, CAS 88382-64-3](/s/PMSXMBKUMFHEFD-UHFFFAOYSA-N.svg)
- 1-(3-Phenylnaphthalen-2-yl)pentan-1-one917980-46-2C21H20O
- 1-[3-(2-Methoxyphenyl)prop-1-en-2-yl]-4-methylnaphthalene84249-67-2C21H20O
- 2,6-Dibenzylidene-4-methylcyclohexan-1-one19186-11-9C21H20O
- 2,5-Dibenzylidene-trans-3,4-dimethylcyclopentanone52186-18-2C21H20O
- Benzene, 1,1'-[1-(2-cyclohexen-1-yloxy)-2-propynylidene]bis-827605-91-4C21H20O
- Benzene, 1,1'-[1-(3-hexynyloxy)-2-propynylidene]bis-827605-94-7C21H20O
- 1,4-Pentadiyn-3-ol, 3-(1,1-dimethylethyl)-1,5-diphenyl-56922-99-7C21H20O
- 6,8-Dimethyl-2-phenyl-9,9a-dihydro-1H-xanthene61075-07-8C21H20O
- 3-Cyclohexyl-2-phenyl-1H-inden-1-one17932-14-8C21H20O
- 1-[(But-2-yn-1-yl)oxy]-4-[(4-propylphenyl)ethynyl]benzene128746-15-6C21H20O
- 4-Phenyl-2-(propan-2-yl)-4,9-dihydroindeno[2,1-b]pyran62225-38-1C21H20O
- 4-Benzyl-2-[(2-methylphenyl)methyl]phenol40789-56-8C21H20O
- 1,6,10b,11,12,12a-Hexahydro-1-methylbenzo[a]pyren-3(2H)-one853925-21-0C21H20O
- (2E,6E)-2,6-Dibenzylidene-3-methylcyclohexan-1-one42019-89-6C21H20O
- 2,5-Dimethyl-3,4-bis(4-methylphenyl)cyclopenta-2,4-dien-1-one65486-27-3C21H20O
- 1-Ethoxy-2,7-diphenylcyclohepta-1,3,5-triene90127-98-3C21H20O
- 7-tert-Butyl-1-methoxypyrene189371-39-9C21H20O
- 1-Benzyl-2-[(benzyloxy)methyl]benzene859313-27-2C21H20O
- A,|A-Dimethyl[1,1':4',1''-terphenyl]-4-methanol17802-71-0C21H20O
- 1-Methoxy-4-(8-phenylocta-1,3,5,7-tetraen-1-yl)benzene62589-82-6C21H20O
- 1,9-Diphenylnona-1,3,6-trien-5-one62510-09-2C21H20O
- 4-Phenyl-2-propyl-4,9-dihydroindeno[2,1-b]pyran62225-37-0C21H20O
- 1,4-Dimethyl-2,3-diphenylbicyclo[2.2.1]hept-2-en-7-one61515-21-7C21H20O
- 2,2-Dimethyl-1-(3-phenylnaphthalen-2-yl)propan-1-one852290-61-0C21H20O
- 4,6-Dibenzyl-o-cresol30090-90-5C21H20O
- 2,6-Dibenzyl-3-methylphenol4732-03-0C21H20O
- 4-Ethyl-alpha,alpha-diphenylbenZenemethanol3139-88-6C21H20O
- 4-(Ethoxy(phenyl)methyl)-1,1'-biphenyl2137934-65-5C21H20O
- 2-([1,1':3',1''-Terphenyl]-5'-yl)propan-2-ol3002454-74-9C21H20O
- Naphthalene, 1-(2-(2-methoxyphenyl)-1-methylethenyl)-4-methyl-84249-66-1C21H20O
- Naphthalene, 1-(2-(2-methoxyphenyl)-1-propen-1-yl)-3-methyl-84249-68-3C21H20O
- 2'-(Cyclohexylethynyl)-[1,1'-biphenyl]-2-carbaldehyde1401236-14-3C21H20O
- 1-(4'-Methyl-[1,1'-biphenyl]-4-yl)-1-phenylethanol3002445-23-7C21H20O
Frequently asked questions
What is the molar mass of C21H20O?
The molar mass of C21H20O is 288.39 g/mol, calculated from standard atomic weights for 21 carbon atoms, 20 hydrogen atoms and 1 oxygen atom. The monoisotopic mass is 288.1514 Da.
How many compounds have the formula C21H20O?
CompoundList lists 57 compounds with the molecular formula C21H20O, including Ethyl trityl ether, 2,5-Diethyl-3,4-diphenylcyclopenta-2,4-dien-1-one, 1,1,3-Triphenyl-propan-1-ol. 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 C21H20O?
C21H20O has a degree of unsaturation of 12. 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.