Test: IUPAC Nomenclature of Coordination Compounds - NEET MCQ

IUPAC name of sodium nitroprusside Na₂[Fe(CN)₅NO] is sodium pentacyanonitrosyl ferrate (III) because in it NO is neutral ligand and the oxidation number of Fe is +3. Which is calculated as Na₂[Fe(CN)₅NO]
2 × (+1) + x +5×(−1)+1×0 = 0
2 + x - 5 = 0
x - 3 = 0
x = + 3

The formula of complex hexamminecobalt (III) chloride sulphate is [Co(NH₃)₆]CISO₄.

The lUPAC name of [Cr(NH₃)₅(NCS)][ZnCI₄] is pentammine isothiocyanatochromium (III) tetrachlorozincate (II).

Decacarbonyldimanganese (0), Mn₂(CO)₁₀, is made up of two square pyramidal Mn(CO)₅ units joined by a Mn-Mn bond.

Ethylenediaminetetraacetate ion (EDTA)^4- is an important hexadentate ligand. It can bind through two nitrogen and four oxygen atoms to a central metal ion.

The IUPAC name of [Ni(PPh₃)CI₂]²⁺ is dichloro bis (triphenylphosphine) nickel (ll)ion.

The brown ring test for nitrates depend on the ability of Fe²⁺ to reduce nitrates to nitric oxide, which reacts with Fe²⁺ to form a brown coloured complex.

The correct option is B Potassium pentachloro(phenyl) antimonate(V)
IUPAC naming of coordination compound:

The names of coordination compounds are derived by the following principles of nomenclature,
1. The cation is named first in both positively and negatively charged coordination entities.
2. The ligands are named in an alphabetical order before the name of the central atom/ion.
3. When coordination entity is anionic, the name of central metal atom end with 'ate' followed by its oxidation number in roman numericals.

In given compound, the charge on coordination entity is -1.
Cl− and phenyl are monodentate anionic ligand.
Thus, the oxidation state of Sb is +5.
Hence, the IUPAC name of the compound K[SbCl₅Ph] is Potassium pentachloro(phenyl)antimonate(V)

K2[OsCI5N] is named as potassium pentachlorozoosmate (VI)

The IUPAC name of NaBH₄ is sodium tetrahydridoborate 

Complexes K[Pt(NH₃)Cl₅] and [Ag(CN)₂]^- have been given their respective IUPAC names.

DMG (bidentate and neutral) is not named correctly, acac, bipy and gly have correct names respectively.

The correct name of ligand in IUPAC name are thiosulphate and cyclopentadienyl [(C₅H₅)^-].

Ionization isomers are identical except that a ligand has exchanged places with anion or neutral molecule that was originally outside the coordination complex.
Thus, in Ionization isomerism the central ion and the other ligands are identical.
So, according to the definition, Cl^- is replaced by NO^2- in the ionization sphere.
 [Cr(H₂O)₄Cl(NO₂)Cl] ---->  [Cr(H₂O)₄Cl(NO₂)]⁺ + Cl^-
[Cr(H₂O)₄Cl₂]NO₂ -----> [Cr(H₂O)₄Cl₂]⁺ + NO₂^-

When a di or polydentate ligand used its two or more d onor atoms to bind a single metal ion. It is said to be a chelate ligand. The number of such ligating groups is called the denticity of the ligand. Such complexes are called chelate complex tend to be more stable than similar complexes containing unidentate ligands.

The correct name of [CoBr(NH₃)₄NO₂] is tetramminebromonitrocobalt (II).

The IUPAC name of [Ni(NH₃)₄][NiCI₄] is tetramminenickel (II) tetrachloronickelate (II).

(i) → (q,t), (ii) → (q ,s), (iii) → (r,t), (iv) → (p ,s)

The complex PtCl4.5NH3 is designated as [Pt(NH3)5Cl]Cl3 which ionizes to [Pt(NH3)5Cl]3+ + 3Cl- ions. Thus, three moles of AgCl are produced from 3Cl- ions with AgNO3.
So, PtCl4.5NH3 is Cationic Complex.

The correct answer is 4.

In [Fe(EDTA)]^-, Let the oxidation state is x then
x - 4 = - 1
⇒ x = 4 - 1 = 3

The structure of potassium dicyanodio xalatonickelate (II) is
K₄[Ni(CN)₂(ox)₂].
K₄[Ni(CN)₂(ox)₂] →  4K⁺ + [Ni(CN)₂(ox)₂]^- 
This produce 5 ions in solution.

EDTA is hexadentate ligand hence, its coordination number is 6.

Ans: c

Explanation:Pt(NH₃)₂Cl(NO₂)

m − 2 = 0 

m = +2 

(NH₃)₂ ⇒ Diammine 

Cl ⇒ Chlorido

NO₂ ⇒ Nitrito-N. 

So, IUPAC NAME: diamminechloridonitrito-N-platinum(II)

[Ni(dmg)₂] : bis (dimethylglyoximato) nickel (II)