Besides X-ray diffraction, a host of techniques have been used in the determinat

Question

Besides X-ray diffraction, a host of techniques have been used in the determination of the structures of coordination compounds, including magnetic susceptibility measurements, UV-VIS spectroscopy, conductivity measurements, dipole moment studies, optical activity, and freezing point depression measurements. Excluding x-ray studies, which of these could be used to distinguish between the following potential isomeric pairs? Explain both your choices and why other methods were rejected.(PtCl_2(en)] vs. [Pt(en)_2][PtCI_4] cis-(NiBr_2(ox)_2] vs. trans-[NiBr_2(ox)_2]

Explanation / Answer

a) This pair is easily distinguishe dby using conductivity meausrments. As the first one of the pair does not conduct because it cannot ionise where as second one of the pair ionise into two cpmplex ions which conduct electricity.

(b) This pair can easily be distinguished by using dipolemoment studies.

As cis isomer has certain amount of dipole moment where as trans isomer shows no dipole moment.

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