Date	Severity	Status	Feedback
Jan 9 2009 12:13PM	Normal	Acknowledged	Not really. Chromium nitride is a defined phase, even if it is neither molecular nor ionic. Surely ChemSpider should also include such compounds. Perhaps it would be better to merge the two entries under the InChI=1/Cr.N ??? For the time being ChemSpider is focused on molecular entities which can be represented by InChIs/ We have the "intention" of supporting other entities in the future even where InChIs cannot be generated but we don't have the resources at present.
Jan 9 2009 6:32AM	Normal	Acknowledged	Hmm, there are problems both here and at WP concerning chromium nitrides! For a start, CrN has two ChemSpider IDs (81581 and 10605911) which give different InChIs for the same compound. Both ChemSpider pages quote [12053-27-9] as a CASRN for this compound, whereas this is the CASRN for Cr2N (NIST-verified). The CASRN for CrN is [24094-93-7] (CAS-verified). Both nitrides are interstitial, so their systematic names are simply "chromium nitride" and "dichromium nitride" (compositional nomenclature) rather than any name which implies ionicity or molecularity. The errors appear to come from suppliers' catalogues. I would suggest that we delete both "structures" from the database since neither is a correct representation of what CrN is...one communicates an ionic nature whereas the other is covalent bonding. Do you agree?