Which of the following complex ions is not di | vedclass

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(B) To determine if a complex is diamagnetic,we check for the presence of unpaired electrons in the central metal ion.$A$. In $[Ti(en)_{2}(NH_{3})_{2}

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$[Cr(NH_{3})_{6}]^{3+}$

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(B) To determine if a complex is diamagnetic,we check for the presence of unpaired electrons in the central metal ion.$A$. In $[Ti(en)_{2}(NH_{3})_{2}]^{4+}$,$Ti$ is in the $+4$ oxidation state ($d^0$ configuration). It has no unpaired electrons,so it is diamagnetic.$B$. In $[Cr(NH_{3})_{6}]^{3+}$,$Cr$ is in the $+3$ oxidation state ($d^3$ configuration). The $d$-orbitals have $3$ unpaired electrons $(t_{2g}^3)$,making it paramagnetic.$C$. In $[Zn(NH_{3})_{6}]^{2+}$,$Zn$ is in the $+2$ oxidation state ($d^{10}$ configuration). It has no unpaired electrons,so it is diamagnetic.$D$. In $[Sc(H_{2}O)_{3}(NH_{3})_{3}]^{3+}$,$Sc$ is in the $+3$ oxidation state ($d^0$ configuration). It has no unpaired electrons,so it is diamagnetic.Therefore,$[Cr(NH_{3})_{6}]^{3+}$ is not diamagnetic.

Which of the following complex ions is not diamagnetic?

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