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  4. Number of isomeric forms (constitutional and stereoisomers) for [Rh(en)2(NO2) (SCN)+ are

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Q. Number of isomeric forms (constitutional and stereoisomers) for $ [Rh(en)_{2}(NO_{2})\,(SCN)^{+} $ are

Delhi UMET/DPMTDelhi UMET/DPMT 2011Coordination Compounds

Solution:

Ambidentate ligands $ NO_{2} $ and SCN will give four different cis isomers and each isomer has two optically active $d$-and $ l $ -forms.
cis--fonn cis- $ (l) $ -form
cis--form cis- $ (l) $ -form
cis--form cis- $ (l) $ -form
$ NO_{2} $ and SCN also give four optically inactive trans isomers.
optically inactive trans (meso) -forms
optically inactive trans (meso)-forms

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