Isomer Calculation for Square Planar Complex
The question asks for the total number of possible isomers for the square-planar complex $[Pt(Cl)(NO_2)(NO_3)(SCN)]^{2–}$. This is a square-planar complex of the type MA_B_C_D_, where all four ligands ($Cl$, $NO_2$, $NO_3$, $SCN$) are different.
Geometric Isomerism
For a square-planar complex with four different ligands (MA_B_C_D_), we consider the relative positions of the ligands. Let's fix one ligand, $Cl$, at a specific position.
- The ligand opposite to $Cl$ can be $NO_2$, $NO_3$, or $SCN$ (3 possibilities).
- For each choice of the opposite ligand, the remaining two ligands can be placed in the two adjacent positions. These two positions are distinct.
- Example: If $NO_2$ is opposite $Cl$, the remaining ligands $NO_3$ and $SCN$ can be arranged as ($NO_3$ left, $SCN$ right) or ($SCN$ left, $NO_3$ right). These two arrangements are distinct.
Therefore, the number of geometric isomers is calculated as:
Number of choices for the opposite ligand $\times$ Number of arrangements for the remaining two ligands
Which is $3 \times 2 = 6$ geometric isomers.
Linkage Isomerism
The complex contains two ligands known to exhibit linkage isomerism:
- Nitrite ion ($NO_2^-$): Can coordinate via Nitrogen ($–NO_2$) or Oxygen ($–ONO$).
- Thiocyanate ion ($SCN^-$): Can coordinate via Sulfur ($–SCN$) or Nitrogen ($–NCS$).
Linkage isomerism leads to different isomers for the same connectivity.
Total Number of Isomers
The total number of isomers is the product of the number of geometric isomers and the number of possible linkage forms. The provided options suggest that only one of the potentially isomerizing ligands contributes to the total count, doubling the number of isomers.
- Number of geometric isomers = 6
- Number of linkage forms for one ambidentate ligand = 2
- Total isomers = (Number of geometric isomers) $\times$ (Number of linkage forms)
- Total isomers = $6 \times 2 = 12$
This calculation assumes that either $NO_2$ or $SCN$ exhibits linkage isomerism, leading to the answer 12.
Final Answer Determination
Based on the calculation considering both geometric and linkage isomerism (assuming one ligand exhibits linkage isomerism), the total number of possible isomers is 12.
Similar Questions
- A chromium complex with a formula $\text{CrCl}_3\cdot 6\text{H}_2\text{O}$ has a spin only magnetic moment value of $3.87 \text{ BM}$ and its solution conductivity corresponds to $1 : 2$ electrolyte. $2.75 \text{ g}$ of the complex solution was initially passed through a cation exchanger. The solution obtained after the process was reacted with excess of $\text{AgNO}_3$. The amount of $\text{AgCl}$ formed in the above process is _____ g. (Nearest integer)
[Given: Molar mass in $\text{g mol}^{-1}$ $\text{Cr} : 52; \text{Cl}: 35.5, \text{Ag}: 108, \text{O}: 16, \text{H}: 1$] - Consider the following reactions :
$\text{NaCl} + \text{K}_2\text{Cr}_2\text{O}_7 + \text{H}_2\text{SO}_4 \rightarrow \text{A} + \text{KHSO}_4 + \text{NaHSO}_4 + \text{H}_2\text{O}$
$\text{A} + \text{NaOH} \rightarrow \text{B} + \text{NaCl} + \text{H}_2\text{O}$
$\text{B} + \text{H}_2\text{SO}_4 + \text{H}_2\text{O}_2 \rightarrow \text{C} + \text{Na}_2\text{SO}_4 + \text{H}_2\text{O}$
In the product 'C', 'X' is the number of $\text{O}_2^{2-}$ units, 'Y' is the total number oxygen atoms present and 'Z' is the oxidation state of Cr. The value of X + Y + Z is ____________. - Identify the metal ions among $\text{Co}^{2+}, \text{Ni}^{2+}, \text{Fe}^{2+}, \text{V}^{3+}$ and $\text{Ti}^{2+}$ having a spin-only magnetic moment value more than $3.0\text{ BM}$. The sum of unpaired electrons present in the high spin octahedral complexes formed by those metal ions is __________.
The crystal field splitting energy of $[\text{Co(oxalate)}_3]^{3-}$ complex is '$n$' times that of the $[\text{Cr(oxalate)}_3]^{3-}$ complex. Here '$n$' is ___________. (Assume $\Delta_o >> P$)
- A metal complex with a formula $MCl_4.3NH_3$ is involved in $sp^3d^2$ hybridisation. It upon reaction with excess of $AgNO_3$ solution gives 'x' moles of AgCl. Consider 'x' is equal to the number of lone pairs of electron present in central atom of $BrF_5$. Then the number of geometrical isomers exhibited by the complex is ______
- Consider the molecules / ions given below
$XeO_3$, $BF_4^-$, $I_3^-$, $SF_6$, $PCl_5$
The ratio of number of molecules having $sp^3d$ hybridisation to those having $sp^3$ hybridisation is ________ - In the leaching method, bauxite ore is digested with a concentrated solution of NaOH that produces 'X'. When $CO_2$ gas is passed through the aqueous solution of 'X', a hydrated compound 'Y' is precipitated. 'X' and 'Y' respectively are :-
- In $KO_2$, the nature of oxygen species and the oxidation state of oxygen atom are, respectively
The correct order of spin-only magnetic moments among the following is :
(Atomic number : Mn = 25, Co = 27, Ni= 28, Zn = 30)
- Biochemical Oxygen Demand (BOD) value can be a measure of water pollution caused by the organic matter. Which of the following statements is correct -
Important Questions from Inorganic Chemistry
- A chromium complex with a formula $\text{CrCl}_3\cdot 6\text{H}_2\text{O}$ has a spin only magnetic moment value of $3.87 \text{ BM}$ and its solution conductivity corresponds to $1 : 2$ electrolyte. $2.75 \text{ g}$ of the complex solution was initially passed through a cation exchanger. The solution obtained after the process was reacted with excess of $\text{AgNO}_3$. The amount of $\text{AgCl}$ formed in the above process is _____ g. (Nearest integer)
[Given: Molar mass in $\text{g mol}^{-1}$ $\text{Cr} : 52; \text{Cl}: 35.5, \text{Ag}: 108, \text{O}: 16, \text{H}: 1$] - Consider the following reactions :
$\text{NaCl} + \text{K}_2\text{Cr}_2\text{O}_7 + \text{H}_2\text{SO}_4 \rightarrow \text{A} + \text{KHSO}_4 + \text{NaHSO}_4 + \text{H}_2\text{O}$
$\text{A} + \text{NaOH} \rightarrow \text{B} + \text{NaCl} + \text{H}_2\text{O}$
$\text{B} + \text{H}_2\text{SO}_4 + \text{H}_2\text{O}_2 \rightarrow \text{C} + \text{Na}_2\text{SO}_4 + \text{H}_2\text{O}$
In the product 'C', 'X' is the number of $\text{O}_2^{2-}$ units, 'Y' is the total number oxygen atoms present and 'Z' is the oxidation state of Cr. The value of X + Y + Z is ____________. - Identify the metal ions among $\text{Co}^{2+}, \text{Ni}^{2+}, \text{Fe}^{2+}, \text{V}^{3+}$ and $\text{Ti}^{2+}$ having a spin-only magnetic moment value more than $3.0\text{ BM}$. The sum of unpaired electrons present in the high spin octahedral complexes formed by those metal ions is __________.
The crystal field splitting energy of $[\text{Co(oxalate)}_3]^{3-}$ complex is '$n$' times that of the $[\text{Cr(oxalate)}_3]^{3-}$ complex. Here '$n$' is ___________. (Assume $\Delta_o >> P$)
- Which of the following is the structure of pyrosulphuric acid?
