For square planar geometry, look for coordination compounds with a central metal atom in the \(d^8\) configuration, such as Ni\(^{2+}\) or Pt\(^{2+}\). Xenon in XeF\(_4\) also follows this rule.
The geometry of a coordination compound is determined by the number of bonds or electron pairs around the central atom.
- CCl\(_4\) (Carbon tetrachloride) has a tetrahedral geometry, not square planar.
- CS\(_2\) (Carbon disulfide) has a linear geometry due to the arrangement of bonding pairs around carbon.
- XeF\(_4\) (Xenon tetrafluoride) is a square planar compound. Xenon, in the +4 oxidation state, has four fluorine atoms arranged in a square planar geometry around the central xenon atom. This geometry is typical for d\(^{10}\)s\(^{2}\)p\(^{6}\)d\(^{10}\)-electronic configurations, where the central atom has two lone pairs.
Thus, XeF\(_4\) is the correct square planar compound.
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