Molecular formula

C₁₈H₂₁N

122 compounds have this formula on CompoundList.

Molar mass: 251.37g/mol
Monoisotopic mass: 251.1674Da
Atoms: 40
Elements: 3
Rings plus double bonds: 9

The formula C18H21N describes a molecule made of 18 carbon atoms, 21 hydrogen atoms and 1 nitrogen 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 × 1886.01%
12.011 × 18 = 216.198 g/mol
H Hydrogen × 218.42%
1.008 × 21 = 21.168 g/mol
N Nitrogen × 15.57%
14.007 × 1 = 14.007 g/mol

Look up another formula

Compounds with the formula C18H21N

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

Showing 101 to 122 of 122 compounds

[2,2-Dimethyl-1-(4-phenylphenyl)cyclopropyl]methanamine

CAS 1537303-86-8C₁₈H₂₁N

1-[(2'-Methyl[1,1'-biphenyl]-3-yl)methyl]pyrrolidine

CAS 2780338-07-8C₁₈H₂₁N

1-[(3'-Methyl[1,1'-biphenyl]-3-yl)methyl]pyrrolidine

CAS 2780338-08-9C₁₈H₂₁N

3-(Diphenylmethyl)-2,2-dimethylcyclopropan-1-amine

CAS 2229310-92-1C₁₈H₂₁N

[1-(Diphenylmethyl)cyclobutyl]methanamine

CAS 2228333-50-2C₁₈H₂₁N

1-(Diphenylmethyl)-2,2-dimethylcyclopropan-1-amine

CAS 2228467-56-7C₁₈H₂₁N

2-[1-(2-Phenylphenyl)cyclopropyl]propan-2-amine

CAS 2228935-95-1C₁₈H₂₁N

2-[1-(4-Phenylphenyl)cyclopropyl]propan-2-amine

CAS 2228503-60-2C₁₈H₂₁N

3-(2,2-Diphenylethyl)pyrrolidine

CAS 2229302-23-0C₁₈H₂₁N

1-[1-(Diphenylmethyl)cyclopropyl]ethan-1-amine

CAS 2228260-87-3C₁₈H₂₁N

1-[2-(2-Phenylphenyl)propan-2-yl]cyclopropan-1-amine

CAS 2229510-90-9C₁₈H₂₁N

1-[2-(4-Phenylphenyl)propan-2-yl]cyclopropan-1-amine

CAS 2229364-03-6C₁₈H₂₁N

1-(3-Phenylpropyl)-1,2,3,4-tetrahydroquinoline

CAS 171415-29-5C₁₈H₂₁N

(2S,5S)-2,5-Dibenzylpyrrolidine

CAS 553638-79-2C₁₈H₂₁N

1-Phenyl-N-[(E)-3-phenylprop-2-enyl]propan-2-amine

CAS 60753-49-3C₁₈H₂₁N

1-Phenyl-N-(1-phenylpropan-2-yl)propan-2-imine

CAS 74917-80-9C₁₈H₂₁N

N-(2-Isopropylphenyl)-2,3-dihydro-1H-inden-2-amine

CAS 1156779-53-1C₁₈H₂₁N

5-(4-Isopropylphenyl)-2,3-dihydro-1H-inden-1-amine

CAS 1963626-72-3C₁₈H₂₁N

3-(2-Isopropylphenyl)-1,2,3,4-tetrahydroquinoline

CAS 2315323-67-0C₁₈H₂₁N

rac-1-[(1R,3R)-3-{[1,1'-Biphenyl]-2-yl}-2,2-dimethylcyclopropyl]methanamine

CAS 2227660-95-7C₁₈H₂₁N

rac-1-[(1R,3R)-3-{[1,1'-Biphenyl]-4-yl}-2,2-dimethylcyclopropyl]methanamine

CAS 2227808-16-2C₁₈H₂₁N

rac-(1R,3S)-3-(Diphenylmethyl)-2,2-dimethylcyclopropan-1-amine

CAS 2227861-46-1C₁₈H₂₁N

Frequently asked questions

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What is the molar mass of C18H21N?

The molar mass of C18H21N is 251.37 g/mol, calculated from standard atomic weights for 18 carbon atoms, 21 hydrogen atoms and 1 nitrogen atom. The monoisotopic mass is 251.1674 Da.

How many compounds have the formula C18H21N?

CompoundList lists 122 compounds with the molecular formula C18H21N, including [2,2-Dimethyl-1-(4-phenylphenyl)cyclopropyl]methanamine, 1-[(2'-Methyl[1,1'-biphenyl]-3-yl)methyl]pyrrolidine, 1-[(3'-Methyl[1,1'-biphenyl]-3-yl)methyl]pyrrolidine. 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 C18H21N?

C18H21N has a degree of unsaturation of 9. 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.