1.

Which one of th efollowing does not form a chelate with oxalate ion by reacting in aqueous solution ?

Answer»

cis-`[CO(NH_(3))_(4)Br_(2)]^(+1)`<BR>cis-`[Co(NH_(3))_(4)Cl_(2)]^(+1)`
cis-`[Co(en)_(2)Cl_(2)]^(+1)`
trans-`[Co(en)_(2)Cl_(2)]^(+1)`

Solution :C is -complexes can form chelate . But trans cannot from chelate ring as it cannot be STABLE .


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