21. Would the oxygens have 3 lone pairs each? 22. The lone pair on the alpha-C oxygen picks up a proton from a nearby Lysine amino acid. 23. A nitrogenous base owes its basic properties to the lone pair of electrons of a nitrogen atom. 24. Water can both donate a lone pair or a proton-- and that is usually the important part. 25. When this occurs, the pi-bond of the electrophile is converted into a lone pair on the oxygen. 26. But the imidazole and pyridine lone pairs also look good for accounting for some of those pKas. 27. These lone pairs are then reconverted back into a pi-bond, resulting in the expulsion of the-OR group. 28. Once all lone pairs are placed, atoms especially the central atoms may not have an octet of electrons. 29. The difference between lone pairs and bonding pairs may also be used to rationalize deviations from idealized geometries. 30. A lone pair of 90-seat self-powered Budd Rail Diesel Cars ( RDCs ) were acquired for express service.
