Coordination Complex [MX2L2]A coordination complex is a compound in which a central metal ion is surrounded by ligands. In this particular complex, the metal ion is represented by M, and it is surrounded by two X ligands and two L ligands.CN=4The coordination number (CN) of a complex refers to the number of ligands that are directly bonded to the central metal ion. In this case, the CN is 4, which means that there are four ligands directly bonded to the metal ion.Unidentate Ligands X and LUnidentate ligands are ligands that can only form one bond with the metal ion. In this complex, there are two different unidentate ligands, X and L.Arrangement of LigandsThe arrangement of ligands around the central metal ion can have a significant impact on the properties of the complex. In this case, the two L ligands are arranged opposite to each other in the complex geometry.IsomersIsomers are compounds that have the same chemical formula but different arrangements of atoms. In coordination complexes, there are several different types of isomers, including:- Geometric isomers: These are isomers that have the same chemical formula but different spatial arrangements of atoms due to the presence of double bonds or a restricted rotation around a bond.- Optical isomers: These are isomers that have the same chemical formula and spatial arrangement of atoms, but they are mirror images of each other and cannot be superimposed.- Structural isomers: These are isomers that have the same chemical formula but different bonding arrangements.Cis and Trans IsomersIn this particular complex, the two L ligands are arranged opposite to each other. This arrangement results in a trans isomer, which means that the two X ligands are located on opposite sides of the complex.If the two L ligands were arranged next to each other, this would result in a cis isomer, which means that the two X ligands would be located on the same side of the complex.Fac and Mer IsomersIn addition to cis and trans isomers, there are two other types of isomers that are commonly found in coordination complexes:- Fac isomers: These are isomers in which three identical ligands are arranged around the central metal ion in a faceted or triangular arrangement.- Mer isomers: These are isomers in which three identical ligands are arranged around the central metal ion in a meridional or linear arrangement.ConclusionIn summary, the coordination complex [MX2L2] has a CN of 4 and two unidentate ligands X and L. When the two L ligands are arranged opposite to each other in the complex geometry, this results in a trans isomer.