10. Isomerism and Crystal Field Theory Flashcards
What dose ambidentate mean?
describes ligands with two more different potential donor atoms
What is a cis isomer?
a stereoisomer in which two groups lie on the same side of a reference plane
What is a cis-trans isomer?
Stereocenters that differ in the positioning of two groups with respect to a reference plane
What are coordination isomers?
isomers that result when ligands are exchanged between a complex cation and a complex anion of the same coordination compound, e.g. [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6]
What is crystal field theory?
a theory that considers the effects of the polarities or the charges of the ligands in a complex ion on the energies of the d orbitals in an octahedral or tetrahedral complex ion
What is crystal field splitting energy?
the difference in energy between two sets of d orbitals in an octahedral or tetrahedral complex ion
What does degenerate mean?
describes orbitals with the same energy
What is disproportionation?
an electrochemical process in whch a species is simultaneously oxidised and reduced to form two different products
What does fac stand for?
Facial
What is a facial isomer?
an isomer of an octahedral complex [ML3X3]+n in which the two sets of ligands occupy the face of an octahedron
What is high-spin?
describes a complex ion or coordination complex with the maximum number of unpaired electrons
What is a hydrate isomer?
isomers of complex ions in which water is either coordinated to the transition metal or acts as water of crystallisation
What does inert mean?
used to describe a substance that is no chemically reactive
What is an ionisation isomer?
isomers in which a coordinated ligand is exchanged with a counterion, e.g. [Co(NH3)5Br]SO4 and [Co(NH3)5SO4]Br
What is a linkage isomer?
isomers that result from the different ways in which an ambidentate ligand can bind to a metal ion
