Coordination Chemisrty

construction & Isomerism in Coordination Complexes Isomers: compounds with the same molecular formula solely incompatible Structural Isomers that differ in which atoms ar bonded to the alloy Structural isomers: [Cr( body of water)5Cl]Cl2H2O
H2O H2O H2O Cr H2O Cl Cl Cl H2O H2O

arrangements of atoms.

Stereoisomers Same atoms atomic number 18 bonded to the Metal, but in different spatial arrangements

vs

[Cr(H2O)6]Cl3
H2O Cr H2O H2O H2O Cl3

Green Linkage isomers : (structural isomers) [Co(NH3)5NO2]Cl2 vs

Violet

[Co(NH3)5ONO]Cl2

Stereoisomers - whitethorn be nonrepresentational or optical Geometric: different geometric arrangements of same ligands Ex. [Pt(NH3)2Cl2] Square planar geometry 2 geometric isomers:

Cis

Trans

cis-platin binding to DNA

 [Co(NH3)4Cl2]Cl

two geometric isomers: cis & trans

cis isomer

cis isomer (rotated 90°)

trans isomer [Co(NH3)3Cl3] two geometric isomers: facial & meridional

trans isomer

fac Optical Isomers (Enantiomers)

mer

differ only in that they are non-superimposable mirror images.



(like left and right hands)

Objects that are not superimposible on their mirror images are said to be Chiral (they posses the quality of handedness) amino acidsare chiral:

Chiral carbon: A carbon atom in a molecule is chiral if 4 different groups are attached to the C. Ex. CHBrClF

Chirality of a metal complex with chelate peal: [Co(en)3]3+ : The chelate rings in [Co(en)3]3+ make thecomplex ion chiral. The optical isomers (or enantiomers) differ only in that they are non-superimposable mirror images. (like left and right hands)

Chiral molecules are optically active the enantiomers rotate plane polarized light equally, but in opposite directions. Other physical properties are the same for enantiomers (optical isomers).

1. How legion(predicate) geometrical isomers are there for [Cr(H2O)4Cl2]+ ?

2. Draw the isomers (geometrical & optical) for [Co(en)2Cl2]+.

Electronic Structure in Coordination Complexes Ligand Field...If you want to get a full essay, point it on our website: Orderessay



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