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Molecular formula

C21H17NO2S

38 compounds have this formula on CompoundList.

Molar mass
347.43g/mol
Monoisotopic mass
347.0980Da
Atoms
42
Elements
5
Rings plus double bonds
14

The formula C21H17NO2S describes a molecule made of 21 carbon atoms, 17 hydrogen atoms, 1 nitrogen atom, 2 oxygen atoms and 1 sulfur 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 × 2172.60%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 174.93%
    1.008 × 17 = 17.136 g/mol
  • N Nitrogen × 14.03%
    14.007 × 1 = 14.007 g/mol
  • O Oxygen × 29.21%
    15.999 × 2 = 31.998 g/mol
  • S Sulfur × 19.23%
    32.06 × 1 = 32.060 g/mol
Look up another formula

Compounds with the formula C21H17NO2S

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

Showing 1 to 38 of 38 compounds

3-Methyl-N-[4-(3-thiophen-2-yl-acryloyl)-phenyl]-benzamide chemical structure, C21H17NO2S, CAS 1164536-83-7
3-Methyl-N-[4-(3-thiophen-2-yl-acryloyl)-phenyl]-benzamide
CAS 1164536-83-7C21H17NO2S
4-Methyl-N-[4-(3-thiophen-2-yl-acryloyl)-phenyl]-benzamide chemical structure, C21H17NO2S, CAS 1164549-22-7
4-Methyl-N-[4-(3-thiophen-2-yl-acryloyl)-phenyl]-benzamide
CAS 1164549-22-7C21H17NO2S
N-(3-Benzoylphenyl)-2-phenylsulfanylacetamide chemical structure, C21H17NO2S, CAS 690681-04-0
N-(3-Benzoylphenyl)-2-phenylsulfanylacetamide
CAS 690681-04-0C21H17NO2S
10H-Phenothiazine, 10-((4-methylphenoxy)acetyl)- chemical structure, C21H17NO2S, CAS 41648-61-7
10H-Phenothiazine, 10-((4-methylphenoxy)acetyl)-
CAS 41648-61-7C21H17NO2S
4-[Isocyano(toluene-4-sulphonyl)methyl]biphenyl chemical structure, C21H17NO2S, CAS 1029104-40-2
4-[Isocyano(toluene-4-sulphonyl)methyl]biphenyl
CAS 1029104-40-2C21H17NO2S
1a,9b-Dihydro-1-((4-methylphenyl)sulfonyl)-1H-phenanthro(9,10-b)azirine chemical structure, C21H17NO2S, CAS 60883-97-8
1a,9b-Dihydro-1-((4-methylphenyl)sulfonyl)-1H-phenanthro(9,10-b)azirine
CAS 60883-97-8C21H17NO2S
Phenyl-N-[4-(2-phenylethynyl)phenyl]methanesulfonamide chemical structure, C21H17NO2S, CAS 439097-35-5
Phenyl-N-[4-(2-phenylethynyl)phenyl]methanesulfonamide
CAS 439097-35-5C21H17NO2S
(E)-N-Phenacyl-2-phenyl-3-thiophen-2-ylprop-2-enamide chemical structure, C21H17NO2S, CAS 478078-54-5
(E)-N-Phenacyl-2-phenyl-3-thiophen-2-ylprop-2-enamide
CAS 478078-54-5C21H17NO2S
2-[2-(Phenylsulfanyl)phenyl]-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione chemical structure, C21H17NO2S, CAS 1052633-40-5
2-[2-(Phenylsulfanyl)phenyl]-3a,4,7,7a-tetrahydro-1H-4,7-methanoisoindole-1,3(2H)-dione
CAS 1052633-40-5C21H17NO2S
10H-Phenothiazine, 10-((2-methylphenoxy)acetyl)- chemical structure, C21H17NO2S, CAS 41648-60-6
10H-Phenothiazine, 10-((2-methylphenoxy)acetyl)-
CAS 41648-60-6C21H17NO2S
10H-Phenothiazine, 10-((3-methylphenoxy)acetyl)- chemical structure, C21H17NO2S, CAS 136776-27-7
10H-Phenothiazine, 10-((3-methylphenoxy)acetyl)-
CAS 136776-27-7C21H17NO2S
N-[4-[(E)-3-Oxo-3-phenylprop-1-enyl]phenyl]-2-thiophen-2-ylacetamide chemical structure, C21H17NO2S, CAS 309736-56-9
N-[4-[(E)-3-Oxo-3-phenylprop-1-enyl]phenyl]-2-thiophen-2-ylacetamide
CAS 309736-56-9C21H17NO2S
Benzenesulfonamide, 4-methyl-N-[2-(phenylethynyl)phenyl]- chemical structure, C21H17NO2S, CAS 442155-91-1
Benzenesulfonamide, 4-methyl-N-[2-(phenylethynyl)phenyl]-
CAS 442155-91-1C21H17NO2S
N-(Furan-3-ylmethyl)-N-(thiophen-2-ylmethyl)-1-naphthamide chemical structure, C21H17NO2S, CAS 1421497-12-2
N-(Furan-3-ylmethyl)-N-(thiophen-2-ylmethyl)-1-naphthamide
CAS 1421497-12-2C21H17NO2S
1-Benzylsulfonyl-1a,9b-dihydrophenanthro(9,10-b)azirine chemical structure, C21H17NO2S, CAS 106686-67-3
1-Benzylsulfonyl-1a,9b-dihydrophenanthro(9,10-b)azirine
CAS 106686-67-3C21H17NO2S
1-(9H-Fluoren-2-ylsulfonyl)indoline chemical structure, C21H17NO2S, CAS 650594-45-9
1-(9H-Fluoren-2-ylsulfonyl)indoline
CAS 650594-45-9C21H17NO2S
2-(Naphthalen-1-ylmethyl)-5,6,7,8-tetrahydro-4H-[1]benzothieno[2,3-d][1,3]oxazin-4-one chemical structure, C21H17NO2S, CAS 356568-78-0
2-(Naphthalen-1-ylmethyl)-5,6,7,8-tetrahydro-4H-[1]benzothieno[2,3-d][1,3]oxazin-4-one
CAS 356568-78-0C21H17NO2S
N-(2-Hydroxy-2-(naphthalen-1-yl)ethyl)benzo[b]thiophene-2-carboxamide chemical structure, C21H17NO2S, CAS 2034349-57-8
N-(2-Hydroxy-2-(naphthalen-1-yl)ethyl)benzo[b]thiophene-2-carboxamide
CAS 2034349-57-8C21H17NO2S
2-(Naphthalen-1-yl)-N-{[5-(thiophen-3-yl)furan-2-yl]methyl}acetamide chemical structure, C21H17NO2S, CAS 2034564-43-5
2-(Naphthalen-1-yl)-N-{[5-(thiophen-3-yl)furan-2-yl]methyl}acetamide
CAS 2034564-43-5C21H17NO2S
N-[2-(Furan-2-yl)-2-(thiophen-3-yl)ethyl]naphthalene-1-carboxamide chemical structure, C21H17NO2S, CAS 2097890-74-7
N-[2-(Furan-2-yl)-2-(thiophen-3-yl)ethyl]naphthalene-1-carboxamide
CAS 2097890-74-7C21H17NO2S
N-[3-[(E)-3-Phenylprop-2-enoyl]phenyl]-2-thiophen-2-ylacetamide chemical structure, C21H17NO2S, CAS 404364-70-1
N-[3-[(E)-3-Phenylprop-2-enoyl]phenyl]-2-thiophen-2-ylacetamide
CAS 404364-70-1C21H17NO2S
(E)-N-(9H-Fluoren-2-yl)-2-phenylethenesulfonamide chemical structure, C21H17NO2S, CAS 1259235-78-3
(E)-N-(9H-Fluoren-2-yl)-2-phenylethenesulfonamide
CAS 1259235-78-3C21H17NO2S
1H-Indole,2-methyl-5-phenyl-1-(phenylsulfonyl)- chemical structure, C21H17NO2S, CAS 849353-51-1
1H-Indole,2-methyl-5-phenyl-1-(phenylsulfonyl)-
CAS 849353-51-1C21H17NO2S
2-Phenyl-3-(p-tolylsulfonyl)-1H-indole chemical structure, C21H17NO2S, CAS 211320-45-5
2-Phenyl-3-(p-tolylsulfonyl)-1H-indole
CAS 211320-45-5C21H17NO2S

Frequently asked questions

What is the molar mass of C21H17NO2S?

The molar mass of C21H17NO2S is 347.43 g/mol, calculated from standard atomic weights for 21 carbon atoms, 17 hydrogen atoms, 1 nitrogen atom, 2 oxygen atoms and 1 sulfur atom. The monoisotopic mass is 347.0980 Da.

How many compounds have the formula C21H17NO2S?

CompoundList lists 38 compounds with the molecular formula C21H17NO2S, including 3-Methyl-N-[4-(3-thiophen-2-yl-acryloyl)-phenyl]-benzamide, 4-Methyl-N-[4-(3-thiophen-2-yl-acryloyl)-phenyl]-benzamide, N-(3-Benzoylphenyl)-2-phenylsulfanylacetamide. 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 C21H17NO2S?

C21H17NO2S 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.