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@DMacks: Sorry for the bad chem notation. In high school, 50 years ago, I was taught the "N→O" notation which apparently meant the same as "N–O−", that is a covalent bond with both electrons coming from the same atom. Am I misremembering? Is that notation still current?--Jorge Stolfi (talk) 08:30, 25 August 2020 (UTC)[reply]
No worries. The arrow is a dative bond, exactly that idea of the origin of the electron pair. The plain-line bond with charges is more representative of the actual structure in most cases, so it's what is usually used in modern literature. The arrow stops getting used, except for some metal–ligand structures, around the level of college gen-chem I think. DMacks (talk) 08:39, 25 August 2020 (UTC)[reply]
