CHE 141 1st Edition Lecture 23 Structural Isomers- Isomers are compounds formed from the same atoms, but within their molecules that atoms are arranged differently in 3-dimensional space- There are two main categories of isomers:o Constitutional (structural) isomers: compounds that have the same chemical formula but different arrangements of the bonds in their moleculeso Stereoisomers (spatial isomers): have the same molecular formulae and sequence of bonded atoms (constitution) but differ in the three dimensional orientations of their atoms in space- There are two subcategories of structural isomers:o Coordination Isomers: when a coordinated ligand exchanges places with an uncoordinated counteriono Linkage Isomers: when ligands coordinate to the metal in different orientationsCoordination Isomers- If two different compounds have the general fomula Co(NH3)5BrCl, an example of coordination isomers would be:o Bromine coordination to the metal and chloride is the counterion [Co(NH30Br]Cl (pentaamminebromocobalt(II) chloride)o Chlorine coordinates to the metal and bromide is the counterion [Co(NH3)Cl]Br (pentaamminechlorocobalt(II) bromide)Linkage IsomersThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- The nitrite on is capable of forming linkage isomers:o The nitrite ion (NO2-) has a lone pair on the N atom as well as lone pairs on the Oatomso Either N or O can form coordinate covalent bonds with the metalo When the nitrite ion coordinates through the N atom it is a nitrato ligand NO2-o When the nitrite ion coordinates through the O atom it is a nitrito ligand,
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