Chapter 22, Problem 69GQ

(a)

Interpretation Introduction

Interpretation: The structures of $fac-Cr(dien)C{l}_3$ and $mer-Cr{(dien)}_{2}C{l}_{2}Br$ has to be drawn.

Concept introduction:

$Spectrochemical$ Series:  A list of ligands ordered in the basis of ligand strength.

${\text{I}}^{\text{-}}\text{<}{\text{Br}}^{\text{-}}\text{<}{\text{Cl}}^{\text{-}}\text{<}{\text{F}}^{\text{-}}{\text{< OH}}^{\text{-}}{\text{< H}}_{\text{2}}{\text{O < NH}}_{\text{3}}\text{< en <}\text{}{\text{CN}}^{\text{-}}\text{<}\text{}\text{CO}$

Paramagnetic property: The presence of unpaired electrons in the electronic configuration of the metal ion in coordination complex.

Diamagnetic property: The absence of unpaired electrons of the metal ion in coordination compound which do repel by the magnet.

Isomerism: Two chemical compounds are said to be isomers if they have same number and kind of atoms but different only in their orientation that is structural arrangements.

There are different types of isomerism in which geometric is of one type where the rotation around the atom is restricted like in cis-trans configuration. This is also refereed as cis-trans isomerism.

(b)

Interpretation Introduction

Interpretation: The two different geometric isomers of $mer-Cr\left(dien\right)C{l}_3$ has to be drawn.

Concept introduction:

$Spectrochemical$ Series:  A list of ligands ordered in the basis of ligand strength.

${\text{I}}^{\text{-}}\text{<}{\text{Br}}^{\text{-}}\text{<}{\text{Cl}}^{\text{-}}\text{<}{\text{F}}^{\text{-}}{\text{< OH}}^{\text{-}}{\text{< H}}_{\text{2}}{\text{O < NH}}_{\text{3}}\text{< en <}\text{}{\text{CN}}^{\text{-}}\text{<}\text{}\text{CO}$

Paramagnetic property: The presence of unpaired electrons in the electronic configuration of the metal ion in coordination complex.

Diamagnetic property: The absence of unpaired electrons of the metal ion in coordination compound which do repel by the magnet.

Isomerism: Two chemical compounds are said to be isomers if they have same number and kind of atoms but different only in their orientation that is structural arrangements.

There are different types of isomerism in which geometric is of one type where the rotation around the atom is restricted like in cis-trans configuration. This is also refereed as cis-trans isomerism.

(c)

Interpretation Introduction

Interpretation: The two different geometric isomers of ${[Cr{\left(dien\right)}_2]}^{3+}$ has to be drawn.

Concept introduction:

$Spectrochemical$ Series:  A list of ligands ordered in the basis of ligand strength.

${\text{I}}^{\text{-}}\text{<}{\text{Br}}^{\text{-}}\text{<}{\text{Cl}}^{\text{-}}\text{<}{\text{F}}^{\text{-}}{\text{< OH}}^{\text{-}}{\text{< H}}_{\text{2}}{\text{O < NH}}_{\text{3}}\text{< en <}\text{}{\text{CN}}^{\text{-}}\text{<}\text{}\text{CO}$

Paramagnetic property: The presence of unpaired electrons in the electronic configuration of the metal ion in coordination complex.

Diamagnetic property: The absence of unpaired electrons of the metal ion in coordination compound which do repel by the magnet.

Isomerism: Two chemical compounds are said to be isomers if they have same number and kind of atoms but different only in their orientation that is structural arrangements.

There are different types of isomerism in which geometric is of one type where the rotation around the atom is restricted like in cis-trans configuration. This is also refereed as cis-trans isomerism.