For 10 points, name these objects, which are partially filled in transition metals.
Magnusson excluded these entities from bonding models of hypervalent second-row molecules. Their angular parts are the cubic harmonics X-sub-2c. The energy difference between two groups of these in one case is referred to as the "delta-octahedral"; the properties of their "splitting" is a prime subject of crystal field theory. Four of these entities are capable of forming a high-order bond, found in some diruthenium and dimolybdenum compounds, denoted by a delta. For high spin, occupancies of four or nine in these entities maximize the strength of the Jahn-Teller effect. For 10 points, name these objects, which are partially filled in transition metals.
Magnusson excluded these entities from bonding models of hypervalent second-row molecules.
d orbitals