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
A.
4.9 and 0
The compound containing [Fe(H2O)6]2 cation and [Fe(CN)6] anion must be [Fe(H2O)6]2 [Fe(CN)6]. It contains 2[Fe(H2O)6]2+ cation and [Fe(CN)6]4– anion in which Iron is present as Fe2+ ion. In [Fe(H2O)6]2+ since H2O is weak ligand there will be 4 unpaired electrons with 4.9 BM while in [Fe(CN)6]4– all the electrons are paired as the CN– is strong ligand with zero unpaired electrons and zero magnetic moment.
The 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 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]+