Molecular formula

C₂₁H₁₇NOS

22 compounds have this formula on CompoundList.

Molar mass: 331.43g/mol
Monoisotopic mass: 331.1031Da
Atoms: 41
Elements: 5
Rings plus double bonds: 14

The formula C21H17NOS describes a molecule made of 21 carbon atoms, 17 hydrogen atoms, 1 nitrogen atom, 1 oxygen atom 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 × 2176.10%
12.011 × 21 = 252.231 g/mol
H Hydrogen × 175.17%
1.008 × 17 = 17.136 g/mol
N Nitrogen × 14.23%
14.007 × 1 = 14.007 g/mol
O Oxygen × 14.83%
15.999 × 1 = 15.999 g/mol
S Sulfur × 19.67%
32.06 × 1 = 32.060 g/mol

Look up another formula

Compounds with the formula C21H17NOS

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

Showing 1 to 22 of 22 compounds

(2Z)-2-(3-Ethylnaphtho[2,1-d][1,3]thiazol-2(3H)-ylidene)-1-phenylethanone

CAS 31897-30-0C₂₁H₁₇NOS

9-{[(4-Methylphenyl)thio]acetyl}-9H-carbazole

CAS 375357-68-9C₂₁H₁₇NOS

4-(2-Phenyl-2,3-dihydro-1,5-benzothiazepin-4-yl)phenol

CAS 64820-41-3C₂₁H₁₇NOS

2-(2-Phenyl-2,3-dihydro-1,5-benzothiazepin-4-yl)phenol

CAS 64820-45-7C₂₁H₁₇NOS

1-(10H-Phenothiazin-10-yl)-3-phenylpropan-1-one

CAS 378233-50-2C₂₁H₁₇NOS

5-Thiophen-2-yl-2,3,5,6-tetrahydro-1H-benzo[a]phenanthridin-4-one

CAS 331674-63-6C₂₁H₁₇NOS

2(1H)-Naphthalenone, 1-[2-(3-ethyl-2(3H)-benzothiazolylidene)ethylidene]-

CAS 95697-53-3C₂₁H₁₇NOS

Ethanone, 2-(1-ethylnaphtho[1,2-d]thiazol-2(1H)-ylidene)-1-phenyl-

CAS 35976-48-8C₂₁H₁₇NOS

2-(4-Ethoxyphenyl)-4-(naphthalen-2-yl)-1,3-thiazole

CAS 795285-95-9C₂₁H₁₇NOS

Phenol, 4-(2,3-dihydro-4-phenyl-1,5-benzothiazepin-2-yl)-

CAS 74629-69-9C₂₁H₁₇NOS

$10-(Furan-2-yl)-9-thia-2-azatetracyclo[9.8.0.0^{3,8}.0^{14,19}]nonadeca-1,3(8),4,6,14(19),15,17-heptaene chemical structure, C21H17NOS, CAS 446270-15-1$

10-(Furan-2-yl)-9-thia-2-azatetracyclo[9.8.0.0^{3,8}.0^{14,19}]nonadeca-1,3(8),4,6,14(19),15,17-heptaene

CAS 446270-15-1C₂₁H₁₇NOS

9-Acridinecarbothioic acid, 9,10-dihydro-10-methyl-, S-phenyl ester

CAS 173407-41-5C₂₁H₁₇NOS

2-(4-Phenyl-2,3-dihydro-1,5-benzothiazepin-2-yl)phenol

CAS 89406-21-3C₂₁H₁₇NOS

2-(1-Ethylbenzo[e][1,3]benzothiazol-2-ylidene)-1-phenylethanone

C₂₁H₁₇NOS

2-(1-Ethylnaphtho[1,2-d][1,3]thiazol-2(1H)-ylidene)-1-phenylethan-1-one

C₂₁H₁₇NOS

O-Naphthalen-2-yl 3-methylquinoline-1(2H)-carbothioate

CAS 58959-94-7C₂₁H₁₇NOS

O-Naphthalen-2-yl 8-methylquinoline-1(2H)-carbothioate

CAS 58959-91-4C₂₁H₁₇NOS

3-Methoxy-6-(methylsulfanyl)-7,8-dihydrobenzo[c]phenanthrene-5-carbonitrile

CAS 701209-99-6C₂₁H₁₇NOS

N-(1,2-Diphenyl-2-sulfanylideneethyl)benzamide

CAS 89873-96-1C₂₁H₁₇NOS

2-{3-[4-(Phenylsulfanyl)phenoxy]but-1-yn-1-yl}pyridine

CAS 89878-52-4C₂₁H₁₇NOS

4-(3-Ethylphenyl)-3-thiophen-2-yl-1H-quinolin-2-one

CAS 1263051-83-7C₂₁H₁₇NOS

3-(1,2-Dihydroacenaphthylen-5-yl)-2-phenyl-1,3-thiazolidin-4-one

CAS 88307-56-6C₂₁H₁₇NOS

Frequently asked questions

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What is the molar mass of C21H17NOS?

The molar mass of C21H17NOS is 331.43 g/mol, calculated from standard atomic weights for 21 carbon atoms, 17 hydrogen atoms, 1 nitrogen atom, 1 oxygen atom and 1 sulfur atom. The monoisotopic mass is 331.1031 Da.

How many compounds have the formula C21H17NOS?

CompoundList lists 22 compounds with the molecular formula C21H17NOS, including (2Z)-2-(3-Ethylnaphtho[2,1-d][1,3]thiazol-2(3H)-ylidene)-1-phenylethanone, 9-{[(4-Methylphenyl)thio]acetyl}-9H-carbazole, 4-(2-Phenyl-2,3-dihydro-1,5-benzothiazepin-4-yl)phenol. 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 C21H17NOS?

C21H17NOS 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.