Isomers
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Co(NH3)4(NO2)2Cl can be made in two forms, Croceo (orange) and Flavo (brown). Jørgensen's and Werner's theories interpret the two isomers differently.
Jørgensen
Werner
The two forms are due to structural isomerism, in which the NO2 group is bonded either by N or O. The two forms are due to stereoisomerism, in which the NO2 groups are across from or next to each other.
Croceo
Flavo
Croceo
Flavo