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1,10-Phenanthroline
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<p>1,10-Phenanthroline (phen) is a <a href="/facts/Heterocyclic/8oYSjJxY">heterocyclic</a> <a href="/facts/Organic_compound/gqCNaN45">organic compound</a>. It is a white solid that is soluble in organic solvents. The 1,10 refers to the location of the nitrogen atoms that replace CH's in the hydrocarbon called <a href="/facts/Phenanthrene/tE9YALIM">phenanthrene</a>. </p><p>Abbreviated "phen", or sometimes "o-phen" for ortho-phenanthroline, it is used as a <a href="/facts/Ligand/6etB3qeW">ligand</a> in <a href="/facts/Coordination_chemistry/1tCyeQUm">coordination chemistry</a>, forming strong <a href="/facts/Coordination_complex/1tCyeQUm">complexes</a> with most metal ions. It is often sold as the <a href="/facts/Hydrate/dev82l69">monohydrate</a>. </p>