New chat PYQ Library Doubts Rank report

Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →

Coordination Compounds question

2021 · 27 Aug · Shift 2 · Q14

Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.

PYQ Library
JEE Main
Chemistry
Coordination Compounds
2021 · 27 Aug · Shift 2 · Q14

Coordination Compounds question

2021 · 27 Aug · Shift 2 · Q14

JEE MainChemistryCoordination CompoundsNumerical+4 / −1

The number of optical isomers possible for

[Cr(C_2O_4)_3]^{3-}

is

\underline{\hspace{2cm}}

.

Numerical answer

View written solutionFree

Correct answer: 2

Identify the complex geometry

The complex is $[Cr(C_2O_4)_3]^{3-}$ Here, $Cr^{3+}$ is coordinated by three oxalate ligands.

Oxalate, $C_2O_4^{2-}$ , is a bidentate ligand.
Three bidentate ligands occupy $6$ coordination sites.

So the complex has octahedral geometry.

Nature of the ligand arrangement

For an octahedral complex of the type $[M(AA)_3]$ where $AA$ is a symmetrical bidentate ligand, the complex can show optical isomerism.

This happens because the three chelate rings can wrap around the metal center in two non-superimposable mirror-image forms:

$\Delta$ form
$\Lambda$ form

These are enantiomers.

Count the optical isomers

Since there are only these two mirror-image forms, the number of optical isomers is $2$

Final answer

$\boxed{2}$

Comparison with stored correct answer

Stored correct answer = $2$

My derived answer = $2$

So they agree.

More from Coordination Compounds

The number of geometrical isomers possible in triamminetrinitrocobalt (III) is X and in trioxalatochromate (III) is Y. Then the value of X + Y is .2021 · Numerical
The type of hybridisation and magnetic property of the complex $[M n C l_{6}]^{3 -}$ , respectively, are :2021 · MCQ
The number of geometrical isomers found in the metal complexes $[P tC l_{2} (N H_{3})_{2}]$ , $[N i (C O)_{4}]$ , $[R u (H_{2} O)_{3} C l_{3}$ and $[C o C l_{2} (N H_{3})_{4}]^{+}$ respectively, are :2021 · MCQ
3 moles of metal complex with formula $C o (e n)_{2} C l_{3}$ gives 3 moles of silver chloride on treatment with excess of silver nitrate. The secondary valency of Co in the complex is . (Round off to the nearest integer)2021 · Numerical
Given below are two statements : Statement I : $[M n (C N)_{6}]^{3 -}$ , $[F e (C N)_{6}]^{3 -}$ and $[C o (C_{2} O_{4})_{3}]^{3 -}$ are d2sp3 hybridised. Statement II : $[M n C l)_{6}]^{3 -}$ and $[F e F_{6}]^{3 -}$ are paramagnetic and…2021 · MCQ
The denticity of an organic ligand, biuret is :2021 · MCQ
Spin only magnetic moment in BM of $[F e (C O)_{4} (C_{2} O_{4})]^{+}$ is :2021 · MCQ
Consider that a d6 metal ion ( $M^{2 +}$ ) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90 BM. The geometry and the crystal field stabilization energy of the complex is2020 · MCQ