Short Answer TypeWrite the IUPAC name of the complex [Cr(NH3)4Cl2]+. What type of isomerism does it exhibit?
Write the IUPAC names of the following coordination compounds:
(i) [Cr(NH3)3Cl3]
(ii) K3[Fe(CN)6]
(iii) [CoBr2(en)2]+, (en = ethylenediamine)Give the formula of each of the following coordination entities:
(i) Co3+ Ion is bound to one Cl-1 , one NH3 molecule and two bidentate ethylenediamine (en) molecules.
(ii) Ni2+ ion is bound to two water molecules and two oxalate ions. Write the name and magnetic behavior of each of the above coordination entities.
(At. No. Co = 27, Ni = 28)
Write the name, stereochemistry and magnetic behavior of the following:
(At. nos. Mn = 25, Co = 27, Ni = 28)
(i) K4[Mn (CN)6]
(ii) [Co (NH3)5Cl]Cl2
(iii) K2[Ni (CN)4]
Using IUPAC norms write the formulate for the following coordination compounds:
(i) Hexaamminecobalt (III) chloride
(ii) Potassium tetrachloridonickelate (II)
(a) Write the hybridization and shape of the following complexes:
(i) [CoF6]3–
(ii) [Ni (CN)4]2–
(Atomic number: Co = 27, Ni = 28)
(b) Out of NH3 and CO, which ligand forms a more stable complex with a transition metal and why?
For the complex [NiCl4]2-, write
(i) The IUPAC name.
(ii) The hybridization type.
(iii) The shape of the complex.
(Atomic no. of Ni = 28)
What is meant by crystal field splitting energy? On the basis of crystal field theory, write the electronic configuration of d4 in terms of t2g and eg in an octahedral field when
(i)
0 > P
(ii) 
0 < P
Crystal Field Splitting Energy: Crystal field theory was given to explain the structure and stability of the coordination complexes. This theory has some assumption like the metal ion is considered to be a point positive charge and the ligands are negative charge. The complexes are formed mainly by the d- block elements due to their variable oxidation states and variable coordination number. The d- subshell has 5 degenerate orbitals. when the ligand approach to the metal ion, the energy of the degenerate orbitals is increased and further splitting of degenerate orbital takes place into t2g and eg orbital. The difference between the t2g and eg orbitals is called as the crystal field splitting energy.
This splitting energy depends on the typo of ligand.
Strong field ligand will have high splitting energy and weak field ligand have low splitting energy.
For electric configuration of d4
(i) When 0 > P
In strong field ligand, the fourth electron will come back and pair in the t2g orbitals. So, the configuration will be Electronic configuration is
(ii) When o < P
In weak field ligand, the Electronic configuration is
Name of the following coordination entities and describe their structure:
(i) [Fe (CN)6]4-
(ii) [Cr (NH3)4Cl2]+
(iii) [Ni (CN) 4]2-
(Atomic numbers Fe = 26. Cr = 24, Ni = 28
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