- eMolecules gives the formula NH=O and the molecular weight as 31.014.
- The PubChem Project gives both NH=O and the correct formula (NO)
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- Chemspider gives 4 different formulae, (HN=O, NO+, NO, NO-) all with different molecular weights.
CrystalEye: data loss and corruption through legacy files
Andrew Dalke raised the issue of data corruption: Nitric oxide (WP) is a very important molecule – it is an essential signalling molecule in the vascular system, and also a serious pollutant from transport. Its formula is NO, one nitrogen atom and one oxygen atom. A large number of freely accessible databases give other formulas:PMR: Here is a widespread and almost universal example of corruption which is almost entirely down to the use of SD (MOL) files and/or SMILES in particular (but is common to almost all legacy formats).