For mono-ionic complex [UO2(NO3)3]-, the correct coordination number a...
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For mono-ionic complex [UO2(NO3)3]-, the correct coordination number and geometry resp are
8 and hexagonal bipyramidal.
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For mono-ionic complex [UO2(NO3)3]-, the correct coordination number a...
Coordination Number and Geometry of [UO2(NO3)3]-
Coordination Number:
The coordination number is defined as the number of ligands that are bound to the central metal ion. In the given mono-ionic complex [UO2(NO3)3]-, the central metal ion is UO2+2.
Here, UO2+2 is surrounded by three NO3- ligands. Each NO3- ligand binds with the metal ion through one of its oxygen atoms.
Therefore, the coordination number of UO2+2 in [UO2(NO3)3]- is 8.
Geometry:
The geometry of a complex is determined by the number of ligands bound to the central metal ion and their arrangement around it.
In the given mono-ionic complex [UO2(NO3)3]-, UO2+2 is surrounded by eight ligands, which can be arranged in different geometries such as square anti-prismatic, hexagonal bipyramidal, and distorted octahedral.
However, the given complex [UO2(NO3)3]- has a hexagonal bipyramidal geometry.
A hexagonal bipyramidal geometry has the following characteristics:
- It has 8 coordination positions around the central metal ion.
- It has two types of positions: axial and equatorial.
- The axial positions are located along the vertical axis and are perpendicular to the equatorial plane.
- The equatorial positions lie in a plane and are equidistant from the vertical axis.
- The angles between the equatorial positions are 120°, and the angles between the axial and equatorial positions are 90°.
Therefore, the correct coordination number and geometry of [UO2(NO3)3]- are 8 and hexagonal bipyramidal, respectively.