Assertion: ligand's pair | /r/HasProperty | available
Facets:
value: for bonding
type: PURPOSE
value: as l-type pi donors
type: MANNER
Source sentences:
text: One lone pair is used as a sigma X donor, the other two lone pairs are available as L-type pi donors.
text: The lone pair of electrons in such complexes is available for bonding, however, and therefore the complex itself can act as a Lewis base or ligand .