Multiple Choice QuestionsThe pair of metal carbonyl complexes that are isoelectronic is
Ni(CO)4 and V(CO)6
[Cr(CO)6] and V(CO)6
[Fe(CO)4]- and Cr(CO)6
[Co(CO)4]- and Ni(CO)4
The compound that inhibits the growth of tumors is:
trans-[Pt(Cl)2(NH3)2]
trans-[Pd(Cl)2(NH3)2]
cis-[Pd(Cl)2(NH3)2]
cis-[Pt(Cl)2(NH3)2]
The calculated spin–only magnetic moments (BM) of the anionic and cationic species of [Fe(H2O)6]2 and [Fe(CN)6], respectively, are :
4.9 and 0
2.84 and 5.92
0 and 5.92
0 and 4.9
The species that can have a trams-isomer (en=ethane-1,2-diamine,ox=oxalate)
[Cr(en)2(ox)]+
[Pr(en)2Cl2]2+
[Zn(en)Cl2]
[Pt(en)Cl2]
The INCORRECT statement is :
The gemstoe, ruby has Cr3+ ions occupying the octahedral sites of beryl
The spin – only magnetic moments of [Fe(H2O)6]2+ and [Cr(H2O)6]2+ are nearly similar.
The color of [CoCl(NH3)5]2+ is violet as it absorbs the yellow light.
The spin only – magnetic moment of [Ni(NH3)4(H2O2)]2+ is 2.83 BM.
The crystal field stabilization energy (CFSE) of [Fe(H2O)6]Cl2 and K2[NiCl4], respectively are:
-2.4 Δ0 and -1.2Δt
-0.4 Δ0 and -1.2Δt
-0.6 Δ0 and -0.8Δt
-0.4 Δ0 and -0.8Δt
Which of the following has longest C-O bond length? (free C-O bond length in CO is 1.128 A0)
[Co(CO)4]-
[Fe(CO)4]-2
[Mn(CO)6]+
[Mn(CO)6]+
B.
[Fe(CO)4]-2
As the negative charge on metal carbonyl complex increases back pi bonding increases and hence the bond length of C-O bond increases while the bond length of metal-carbon bond decreases. Hence,[Fe(CO)4]2- has longest C-O bond length among the given complexes.
The correct order of bond length of the given complexes is
[Mn(CO)6]+<[Ni(CO)4]<[Co(CO)4]-<[Fe(CO)4]2-
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