For molecules with five identical ligands, the axial bond lengths tend to be longer because the ligand atom cannot approach the central atom as closely.
42.
The prefix " per-", however, is used only when the central atom is a halogen or a group 7 element.
43.
"' Zirconocene dichloride "'is an organozirconium compound composed of a zirconium central atom, with two cyclopentadienyl and two chloro ligands.
44.
The central atoms must be identified, i . e . by assigning numbers to them . ( This is formally dealt with in the recommendations ).
45.
The polyhalogen ions always have the heaviest and least electronegative halogen present in the ion as the central atom, making the ion asymmetric in some cases.
46.
There exists a mathematical relationship among the bond angles for one central atom and four peripheral atoms ( labeled 1 through 4 ) expressed by the following determinant.
47.
For example, when there are two electron pairs surrounding the central atom, their mutual repulsion is minimal when they lie at opposite poles of the sphere.
48.
In coordination complexes, only the first or sigma bond between each ligand and the central atom counts, but not any pi bonds to the same ligands.
49.
I've been unable to find a satisfactory answer to this : What would the central atom on N 2 be to draw an accurate VSEPR sketch?
50.
If there are 3 electron pairs surrounding the central atom, their repulsion is minimized by placing them at the vertices of an equilateral triangle centered on the atom.
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