Assertion: ligand's pair | /r/HasProperty | shared
Facets:
Source sentences:
text: For example, boron trifluoride (BF 3 ) and ammonia (NH 3 ) form an adduct or coordination complex F 3 B←NH 3 with a B–N bond in which a lone pair of electrons on N is shared with an empty atomic orbital on B. BF 3 with an empty orbital is described as an electron pair acceptor or Lewis acid, while NH 3 with a lone pair that can be shared is described as an electron-pair donor or Lewis base.