C21H14O
49 compounds have this formula on CompoundList.
- Molar mass
- 282.34g/mol
- Monoisotopic mass
- 283.1078Da
- Atoms
- 36
- Elements
- 3
- Rings plus double bonds
- 15
The formula C21H14O describes a molecule made of 21 carbon atoms, 14 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 × 2189.34%12.011 × 21 = 252.231 g/mol
- H Hydrogen × 145.00%1.008 × 14 = 14.112 g/mol
- O Oxygen × 15.67%15.999 × 1 = 15.999 g/mol
Compounds with the formula C21H14O
Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.
Showing 1 to 49 of 49 compounds
![Phenyl-[4-(phenylethynyl)phenyl]methanone chemical structure, C21H14O, CAS 57542-59-3](/s/APNHTMSSOMMQCF-UHFFFAOYSA-N.svg)
- Dibenzoxanthene64093-64-7C21H14O
- [1,1'-Binaphthalene]-2-carboxaldehyde605-79-8C21H14O
- Benzo(a)pyrene-1-methanol86072-96-0C21H14O
- Methanone, phenyl[2-(phenylethynyl)phenyl]-221458-86-2C21H14O
- 3-(Anthracen-10-yl)benzaldehyde324750-98-3C21H14O
- Benzo(a)pyrene-10-methanol86803-18-1C21H14O
- (Phenanthren-1-yl)(phenyl)methanone6453-93-6C21H14O
- 4-([1,1'-Biphenyl]-4-ylethynyl)benzaldehyde475115-52-7C21H14O
- 4'-(Phenylethynyl)[1,1'-biphenyl]-4-carbaldehyde185310-18-3C21H14O
- 4-Methoxybenzo(a)pyrene56182-99-1C21H14O
- 5-Methoxybenzo[pqr]tetraphene56183-00-7C21H14O
- Benzo(a)pyrene-6-methanol-13C62084-24-6C21H14O
- 7-Methoxybenzo(k)fluoranthene116208-75-4C21H14O
- Benzo(a)pyrene-5-methanol29852-45-7C21H14O
- Benzo(a)pyrene-4-methanol86073-01-0C21H14O
- Benzo(a)pyrene, 7-methoxy-63041-71-4C21H14O
- Benzo(a)pyren-7-ylmethanol78636-32-5C21H14O
- Benzo(a)pyren-3-ol, 7-methyl-79418-83-0C21H14O
- Benzo(a)pyren-9-ol, 7-methyl-79418-87-4C21H14O
- 9-Methoxybenzo[a]pyrene17573-32-9C21H14O
- 2-(Anthracen-1-yl)benzaldehyde1788-04-1C21H14O
- 2'-(Phenylethynyl)-[1,1'-biphenyl]-2-carbaldehyde1386987-31-0C21H14O
- 11-Methoxybenzo[e]acephenanthrylene100516-32-3C21H14O
- 3-([1,1'-Biphenyl]-4-yl)-1-phenylprop-2-yn-1-one112539-34-1C21H14O
- 2-([1,1'-Biphenyl]-4-ylethynyl)benzaldehyde1017235-21-0C21H14O
Frequently asked questions
What is the molar mass of C21H14O?
The molar mass of C21H14O is 282.34 g/mol, calculated from standard atomic weights for 21 carbon atoms, 14 hydrogen atoms and 1 oxygen atom. The monoisotopic mass is 283.1078 Da.
How many compounds have the formula C21H14O?
CompoundList lists 49 compounds with the molecular formula C21H14O, including Di(naphthalen-1-yl)methanone, 9-Benzoylanthracene, 2,3-Diphenyl-1H-inden-1-one. 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 C21H14O?
C21H14O 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.