Molecular Mass Calculator by Christoph Gohlke

The Molecular Mass Calculator calculates the average molar mass, the elementary analysis and the molecular mass distribution spectrum (fractions of mass numbers) of a molecule given by its chemical formula. Calculations are based on the isotopic composition of the elements. Mass deficiency due to chemical bonding is not taken into account.

Try AgCuRu4(H)2[CO]12{PPh3}2 for example.

The following case sensitive tokens are allowed in the formula:

• Symbols (H..Mt) of the chemical elements.
• Parentheses (),[] or {} to group elements or aliases.
• Numbers to count elements, aliases or groups of elements.
• Aliases representing frequently used groups of elements, e.g.:
  
  

  Me		CH3		Et		C2H5		Ph		C6H5
  Hx		C6H11		Bz		C7H5O		Cp		C5H5
  Cy		C6H11		Bu		C4H9		Py		C5H5N
  Prop		C3H7		Bzl		C7H7		complete listing

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