Coordination Number | Molecular Geometry |
2 | linear |
3 | trigonal planar |
4 | tetrahedral(d0 or d10), low oxidation states for M |
4 | square planar (d8) |
5 | trigonal bipyramidal |
5 | square pyramidal |
6 | octahedral |
7 | pentagonal bipyramid |
8 | square antiprism |
8 | dodecahedron |
9 and above | more complicated structures |
The coordination number of the central metal ion or atom is the number of donor atoms bonded to it.
Which of the following geometries for the complex ion [Fe(en)Cl4]? are possible?
a) linear
b) trigonal bipyramidal or square pyramidal
c) octahedral
d) trigonal planar
e) tetrahedral or square planar
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