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Molecular formula

C21H18ClOP

2 compounds have this formula on CompoundList.

Molar mass
352.80g/mol
Monoisotopic mass
352.0784Da
Atoms
42
Elements
5
Rings plus double bonds
13

The formula C21H18ClOP describes a molecule made of 21 carbon atoms, 18 hydrogen atoms, 1 chlorine atom, 1 oxygen atom and 1 phosphorus 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 × 2171.49%
    12.011 × 21 = 252.231 g/mol
  • H Hydrogen × 185.14%
    1.008 × 18 = 18.144 g/mol
  • Cl Chlorine × 110.05%
    35.45 × 1 = 35.450 g/mol
  • O Oxygen × 14.53%
    15.999 × 1 = 15.999 g/mol
  • P Phosphorus × 18.78%
    30.974 × 1 = 30.974 g/mol
Look up another formula

Compounds with the formula C21H18ClOP

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

Showing 1 to 2 of 2 compounds

1-Chloro-3-(triphenyl phosphoranylidene)propan-2-one chemical structure, C21H18ClOP, CAS 13605-66-8
1-Chloro-3-(triphenyl phosphoranylidene)propan-2-one
CAS 13605-66-8C21H18ClOP
Chloro(triphenyl)[(prop-2-yn-1-yl)oxy]-lambda~5~-phosphane chemical structure, C21H18ClOP, CAS 143554-45-4
Chloro(triphenyl)[(prop-2-yn-1-yl)oxy]-lambda~5~-phosphane
CAS 143554-45-4C21H18ClOP

Frequently asked questions

What is the molar mass of C21H18ClOP?

The molar mass of C21H18ClOP is 352.80 g/mol, calculated from standard atomic weights for 21 carbon atoms, 18 hydrogen atoms, 1 chlorine atom, 1 oxygen atom and 1 phosphorus atom. The monoisotopic mass is 352.0784 Da.

How many compounds have the formula C21H18ClOP?

CompoundList lists 2 compounds with the molecular formula C21H18ClOP, including 1-Chloro-3-(triphenyl phosphoranylidene)propan-2-one, Chloro(triphenyl)[(prop-2-yn-1-yl)oxy]-lambda~5~-phosphane. 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 C21H18ClOP?

C21H18ClOP 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.