Assertion: octahedron | /r/LocatedNear | the metal atom
Facets:
Source sentences:
text: 3 , two isomers are possible - a facial isomer (fac) in which each set of three identical ligands occupies one face of the octahedron surrounding the metal atom, so that any two of these three ligands are mutually cis, and a meridional isomer (mer) in which each set of three identical ligands occupies a plane passing through the metal atom.