Boron nitride is a material isoelectronic to carbon. The compound is isoelectronic and isostructural with benzene. It isoelectronic with nitrogen monoxide and is paramagnetic. The same is true of its isoelectronic CBH carborane analogues. This is valence isoelectronic with the ozonide ion. MFP is similar to and isoelectronic with NaSO. With fluoride, PF forms PF, an anion that is isoelectronic with SF. The ion is linear and is isoelectronic with CO. Compounds which are isoelectronic usually have similar chemical structures. Compared to the isoelectronic carbon dioxide, CS is a weaker electrophile. The pyridinium cation is isoelectronic with benzene. It exists in various crystalline forms that are isoelectronic to a similarly structured carbon lattice. Isoelectronic species have same bond number. The two were similar in NH-terminal sequence, peptide map, subunit molecular weight, and isoelectronic point. Further catenation is rare, although (isoelectronic with carbonate and nitrate) is known.