1.

Find the number of complex(es) which have at least one five member chelate ring formed by two carbon atoms, two nitrogen atoms and one central metal. (a)[Co(EDTA)]^(-)""(b) [Co(en)_(3)]^(3+) (c ) [Co(Gly)_(3)]^(0)""(d) [Co(bipy)_(3)]^(+3) (e ) [Co(oxalate)_(3)]^(-3)""(f) [Co(dien)(NH_(3))_(3)]^(+3)

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SOLUTION :(a),(B),(d),(F)


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