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Molecular formula

C21H16Cl2N4O2

39 compounds have this formula on CompoundList.

Molar mass
427.29g/mol
Monoisotopic mass
426.0650Da
Atoms
45
Elements
5
Rings plus double bonds
15

The formula C21H16Cl2N4O2 describes a molecule made of 21 carbon atoms, 16 hydrogen atoms, 2 chlorine atoms, 4 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 × 2159.03%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 163.77%
    1.008 × 16 = 16.128 g/mol
  • Cl Chlorine × 216.59%
    35.45 × 2 = 70.900 g/mol
  • N Nitrogen × 413.11%
    14.007 × 4 = 56.028 g/mol
  • O Oxygen × 27.49%
    15.999 × 2 = 31.998 g/mol
Look up another formula

Compounds with the formula C21H16Cl2N4O2

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

Showing 1 to 39 of 39 compounds

PD-166326 chemical structure, C21H16Cl2N4O2, CAS 185039-91-2
PD-166326
CAS 185039-91-2C21H16Cl2N4O2
6-(2,6-Dichlorophenyl)-2-[(2-methoxyphenyl)amino]-8-methyl-7H,8H-pyrido[2,3-d]pyrimidin-7-one chemical structure, C21H16Cl2N4O2, CAS 185039-80-9
6-(2,6-Dichlorophenyl)-2-[(2-methoxyphenyl)amino]-8-methyl-7H,8H-pyrido[2,3-d]pyrimidin-7-one
CAS 185039-80-9C21H16Cl2N4O2
6-(2,6-Dichlorophenyl)-2-[(3-methoxyphenyl)amino]-8-methyl-7H,8H-pyrido[2,3-d]pyrimidin-7-one chemical structure, C21H16Cl2N4O2, CAS 185039-81-0
6-(2,6-Dichlorophenyl)-2-[(3-methoxyphenyl)amino]-8-methyl-7H,8H-pyrido[2,3-d]pyrimidin-7-one
CAS 185039-81-0C21H16Cl2N4O2
3-Chloro-N-[2-(4-chlorophenyl)-2H-1,2,3-benzotriazol-5-yl]-4-ethoxybenzamide chemical structure, C21H16Cl2N4O2, CAS 346651-27-2
3-Chloro-N-[2-(4-chlorophenyl)-2H-1,2,3-benzotriazol-5-yl]-4-ethoxybenzamide
CAS 346651-27-2C21H16Cl2N4O2
3,4-Dichloro-N-[2-(4-ethoxyphenyl)-2H-benzotriazol-5-yl]benzamide chemical structure, C21H16Cl2N4O2, CAS 332152-27-9
3,4-Dichloro-N-[2-(4-ethoxyphenyl)-2H-benzotriazol-5-yl]benzamide
CAS 332152-27-9C21H16Cl2N4O2
(Z)-2,4-Dichloro-N-(1-(1-cyano-2-oxo-2-(propylamino)ethylidene)-1H-isoindol-3-yl)benzamide chemical structure, C21H16Cl2N4O2, CAS 902023-64-7
(Z)-2,4-Dichloro-N-(1-(1-cyano-2-oxo-2-(propylamino)ethylidene)-1H-isoindol-3-yl)benzamide
CAS 902023-64-7C21H16Cl2N4O2
5-(4-(4-Chlorobenzoyl)piperazin-1-yl)-2-(3-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 903586-72-1
5-(4-(4-Chlorobenzoyl)piperazin-1-yl)-2-(3-chlorophenyl)oxazole-4-carbonitrile
CAS 903586-72-1C21H16Cl2N4O2
3,5-Dichloro-4-methoxy-N-(6-methyl-2-phenylbenzotriazol-5-yl)benzamide chemical structure, C21H16Cl2N4O2, CAS 347333-56-6
3,5-Dichloro-4-methoxy-N-(6-methyl-2-phenylbenzotriazol-5-yl)benzamide
CAS 347333-56-6C21H16Cl2N4O2
2,5-Dichloro-N-[2-(4-methoxyphenyl)-6-methyl-2H-benzotriazol-5-yl]benzamide chemical structure, C21H16Cl2N4O2, CAS 6175-32-2
2,5-Dichloro-N-[2-(4-methoxyphenyl)-6-methyl-2H-benzotriazol-5-yl]benzamide
CAS 6175-32-2C21H16Cl2N4O2
1-(5-(Benzyloxy)-2,4-dichlorophenyl)-5-(4-methoxyphenyl)-1H-1,2,3,4-tetraazole chemical structure, C21H16Cl2N4O2, CAS 338961-51-6
1-(5-(Benzyloxy)-2,4-dichlorophenyl)-5-(4-methoxyphenyl)-1H-1,2,3,4-tetraazole
CAS 338961-51-6C21H16Cl2N4O2
3-Chloro-N-(6-chloro-2-phenylbenzotriazol-5-yl)-4-ethoxybenzamide chemical structure, C21H16Cl2N4O2, CAS 642430-37-3
3-Chloro-N-(6-chloro-2-phenylbenzotriazol-5-yl)-4-ethoxybenzamide
CAS 642430-37-3C21H16Cl2N4O2
5-(4-(3-Chlorobenzoyl)piperazin-1-yl)-2-(4-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 903191-78-6
5-(4-(3-Chlorobenzoyl)piperazin-1-yl)-2-(4-chlorophenyl)oxazole-4-carbonitrile
CAS 903191-78-6C21H16Cl2N4O2
5-(4-(4-Chlorobenzoyl)piperazin-1-yl)-2-(4-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 903863-96-7
5-(4-(4-Chlorobenzoyl)piperazin-1-yl)-2-(4-chlorophenyl)oxazole-4-carbonitrile
CAS 903863-96-7C21H16Cl2N4O2
5-(4-(2-Chlorobenzoyl)piperazin-1-yl)-2-(2-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 903584-89-4
5-(4-(2-Chlorobenzoyl)piperazin-1-yl)-2-(2-chlorophenyl)oxazole-4-carbonitrile
CAS 903584-89-4C21H16Cl2N4O2
5-(4-(3-Chlorobenzoyl)piperazin-1-yl)-2-(2-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 903205-75-4
5-(4-(3-Chlorobenzoyl)piperazin-1-yl)-2-(2-chlorophenyl)oxazole-4-carbonitrile
CAS 903205-75-4C21H16Cl2N4O2
5-(4-(4-Chlorobenzoyl)piperazin-1-yl)-2-(2-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 903855-34-5
5-(4-(4-Chlorobenzoyl)piperazin-1-yl)-2-(2-chlorophenyl)oxazole-4-carbonitrile
CAS 903855-34-5C21H16Cl2N4O2
5-(4-(3-Chlorobenzoyl)piperazin-1-yl)-2-(3-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 905429-74-5
5-(4-(3-Chlorobenzoyl)piperazin-1-yl)-2-(3-chlorophenyl)oxazole-4-carbonitrile
CAS 905429-74-5C21H16Cl2N4O2
5-(4-(2-Chlorobenzoyl)piperazin-1-yl)-2-(4-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 946377-36-2
5-(4-(2-Chlorobenzoyl)piperazin-1-yl)-2-(4-chlorophenyl)oxazole-4-carbonitrile
CAS 946377-36-2C21H16Cl2N4O2
5-(4-(2-Chlorobenzoyl)piperazin-1-yl)-2-(3-chlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 946377-73-7
5-(4-(2-Chlorobenzoyl)piperazin-1-yl)-2-(3-chlorophenyl)oxazole-4-carbonitrile
CAS 946377-73-7C21H16Cl2N4O2
5-(4-Benzoylpiperazin-1-yl)-2-(2,4-dichlorophenyl)oxazole-4-carbonitrile chemical structure, C21H16Cl2N4O2, CAS 946308-97-0
5-(4-Benzoylpiperazin-1-yl)-2-(2,4-dichlorophenyl)oxazole-4-carbonitrile
CAS 946308-97-0C21H16Cl2N4O2
N-(2-Chlorobenzyl)-2-(2-(3-(3-chlorophenyl)-1,2,4-oxadiazol-5-yl)-1H-pyrrol-1-yl)acetamide chemical structure, C21H16Cl2N4O2, CAS 1260621-36-0
N-(2-Chlorobenzyl)-2-(2-(3-(3-chlorophenyl)-1,2,4-oxadiazol-5-yl)-1H-pyrrol-1-yl)acetamide
CAS 1260621-36-0C21H16Cl2N4O2
N-(4-Chlorobenzyl)-2-(2-(3-(3-chlorophenyl)-1,2,4-oxadiazol-5-yl)-1H-pyrrol-1-yl)acetamide chemical structure, C21H16Cl2N4O2, CAS 1261018-38-5
N-(4-Chlorobenzyl)-2-(2-(3-(3-chlorophenyl)-1,2,4-oxadiazol-5-yl)-1H-pyrrol-1-yl)acetamide
CAS 1261018-38-5C21H16Cl2N4O2
2-Chloro-N-[2-(3-chloro-4-methoxyphenyl)benzotriazol-5-yl]-4-methylbenzamide chemical structure, C21H16Cl2N4O2, CAS 431922-35-9
2-Chloro-N-[2-(3-chloro-4-methoxyphenyl)benzotriazol-5-yl]-4-methylbenzamide
CAS 431922-35-9C21H16Cl2N4O2
2-(2,4-Dichlorophenyl)-9-(3-hydroxyphenyl)-5,6,7,9-tetrahydro-[1,2,4]triazolo[5,1-b]quinazolin-8(4H)-one chemical structure, C21H16Cl2N4O2, CAS 539849-52-0
2-(2,4-Dichlorophenyl)-9-(3-hydroxyphenyl)-5,6,7,9-tetrahydro-[1,2,4]triazolo[5,1-b]quinazolin-8(4H)-one
CAS 539849-52-0C21H16Cl2N4O2

Frequently asked questions

What is the molar mass of C21H16Cl2N4O2?

The molar mass of C21H16Cl2N4O2 is 427.29 g/mol, calculated from standard atomic weights for 21 carbon atoms, 16 hydrogen atoms, 2 chlorine atoms, 4 nitrogen atoms and 2 oxygen atoms. The monoisotopic mass is 426.0650 Da.

How many compounds have the formula C21H16Cl2N4O2?

CompoundList lists 39 compounds with the molecular formula C21H16Cl2N4O2, including PD-166326, 6-(2,6-Dichlorophenyl)-2-[(2-methoxyphenyl)amino]-8-methyl-7H,8H-pyrido[2,3-d]pyrimidin-7-one, 6-(2,6-Dichlorophenyl)-2-[(3-methoxyphenyl)amino]-8-methyl-7H,8H-pyrido[2,3-d]pyrimidin-7-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 C21H16Cl2N4O2?

C21H16Cl2N4O2 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.