CompoundList
Sign in
Molecular formula

C21H20N2O2

204 compounds have this formula on CompoundList.

Molar mass
332.40g/mol
Monoisotopic mass
332.1525Da
Atoms
45
Elements
4
Rings plus double bonds
13

The formula C21H20N2O2 describes a molecule made of 21 carbon atoms, 20 hydrogen atoms, 2 nitrogen atoms and 2 oxygen atoms. 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 × 2175.88%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 206.06%
    1.008 × 20 = 20.160 g/mol
  • N Nitrogen × 28.43%
    14.007 × 2 = 28.014 g/mol
  • O Oxygen × 29.63%
    15.999 × 2 = 31.998 g/mol
Look up another formula

Compounds with the formula C21H20N2O2

Isomers we list, best known first. Open one to see its structure, properties, safety data and suppliers.

Showing 201 to 204 of 204 compounds

1-Oxo-2-(2-phenylethyl)-N-(prop-2-en-1-yl)-1,2-dihydroisoquinoline-3-carboxamide chemical structure, C21H20N2O2, CAS 3054557-21-7
1-Oxo-2-(2-phenylethyl)-N-(prop-2-en-1-yl)-1,2-dihydroisoquinoline-3-carboxamide
CAS 3054557-21-7C21H20N2O2
2-(4,5-Diphenyl-1,3-oxazol-2-yl)-1-pyrrolidin-1-ylethanone chemical structure, C21H20N2O2, CAS 34015-86-6
2-(4,5-Diphenyl-1,3-oxazol-2-yl)-1-pyrrolidin-1-ylethanone
CAS 34015-86-6C21H20N2O2
3-(7-(Diethylamino)-4-methyl-2-oxo-2H-chromen-3-yl)benzonitrile chemical structure, C21H20N2O2, CAS 2594424-78-7
3-(7-(Diethylamino)-4-methyl-2-oxo-2H-chromen-3-yl)benzonitrile
CAS 2594424-78-7C21H20N2O2
(E)-2-Cyano-3-(4-hydroxyphenyl)-N-[[1-(2-methylphenyl)cyclopropyl]methyl]prop-2-enamide chemical structure, C21H20N2O2
(E)-2-Cyano-3-(4-hydroxyphenyl)-N-[[1-(2-methylphenyl)cyclopropyl]methyl]prop-2-enamide
C21H20N2O2

Frequently asked questions

What is the molar mass of C21H20N2O2?

The molar mass of C21H20N2O2 is 332.40 g/mol, calculated from standard atomic weights for 21 carbon atoms, 20 hydrogen atoms, 2 nitrogen atoms and 2 oxygen atoms. The monoisotopic mass is 332.1525 Da.

How many compounds have the formula C21H20N2O2?

CompoundList lists 204 compounds with the molecular formula C21H20N2O2, including 1-Oxo-2-(2-phenylethyl)-N-(prop-2-en-1-yl)-1,2-dihydroisoquinoline-3-carboxamide, 2-(4,5-Diphenyl-1,3-oxazol-2-yl)-1-pyrrolidin-1-ylethanone, 3-(7-(Diethylamino)-4-methyl-2-oxo-2H-chromen-3-yl)benzonitrile. 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 C21H20N2O2?

C21H20N2O2 has a degree of unsaturation of 13. 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.