the red coloured Wilkinson's catalyst, `[RhCl(PPh_(3))_(3)]` is a homogenous catalyst used hydrogenation of alkenes. Which of the following is/are correct about is?

Options

A. it is diamagnetic complex.
B. its IUPAC name is chloridotris (phenylphoshine) rhodium(I).
C. its coordination geometry about Rh is square planar.
D. it has `4sp^(3)` hybridized atoms.

Explanation

To solve the question regarding the Wilkinson's catalyst, `[RhCl(PPh₃)₃]`, we will analyze the statements provided about this catalyst step by step.

### Step 1: Understanding the Catalyst
Wilkinson's catalyst is a complex of rhodium (Rh) with chloride (Cl) and triphenylphosphine (PPh₃) ligands. It is known for its role as a homogeneous catalyst in the hydrogenation of alkenes.

### Step 2: Analyzing the First Statement
**Statement 1:** "It is a diamagnetic complex."

- **Explanation:** A diamagnetic complex has no unpaired electrons. The oxidation state of rhodium in this complex is +1. The electronic configuration of Rh in its elemental state is [Kr] 4d⁷ 5s². Upon losing one electron, the configuration becomes [Kr] 4d⁷ 5s¹.
- **Hybridization:** The presence of strong field ligands (like PPh₃) leads to pairing of the d-electrons. In this case, all d-electrons become paired, resulting in no unpaired electrons.
- **Conclusion:** This statement is **correct**.

### Step 3: Analyzing the Second Statement
**Statement 2:** "Its IUPAC name is chlorido-tris-phenyl-phosphine-rhodium-1."

- **Explanation:** The correct IUPAC naming convention for this complex should include the tri prefix in parentheses. The correct name is "chlorido(tris(phenyl)phosphine)rhodium(I)".
- **Conclusion:** This statement is **incorrect**.

### Step 4: Analyzing the Third Statement
**Statement 3:** "Its coordination geometry about rhodium is square planar."

- **Explanation:** The coordination number of rhodium in this complex is 4, which leads to a square planar geometry. The hybridization involved is dsp², which is typical for square planar complexes.
- **Conclusion:** This statement is **correct**.

### Step 5: Analyzing the Fourth Statement
**Statement 4:** "It has 4 sp³ hybridized atoms."

- **Explanation:** The hybridization of the central metal (rhodium) in this complex is dsp², not sp³. The presence of four coordination sites does not imply sp³ hybridization.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion
Based on the analysis:
- Statement 1 is correct.
- Statement 2 is incorrect.
- Statement 3 is correct.
- Statement 4 is incorrect.

Thus, the correct options are **Statement 1 and Statement 3**.