Which one of the following has a square planar geometry?
[CoCl4]2-
[FeCl4]2–
[NiCl4] 2–
[NiCl4] 2–
D.
[NiCl4] 2–
As Cl- is weak field ligand so no pairing up.Hence it is sp3 hybridized giving tetrahedral geometry.
Fe2+ - 1s2 2s2 2p6 3s2 3p6 3d6 4s0
Due to Cl-, back pairing is not observed so it will be sp3 hybridized giving tetrahedral geometry.
Ni2+ - 1s2 2s2 2p6 3s2 3p6 3d8 4s0
Because weak ligand, back pairing is not observed so it will be sp3 i.e. tetrahedral geometry.
All the complexes of Pt2+ are square planar including those with weak field ligand such as halide ions
Which of the following pairs represents linkage isomers?
[Cu(NH3)4][PtCl4] and [Pt(NH3)4][CuCl4]
[Pd(PPh3)2(NCS)2] and [Pd(PPh3)2(SCN)2]
[CO(NH3)5NO3]SO4 and [CO(NH3)5SO4]NO3
[CO(NH3)5NO3]SO4 and [CO(NH3)5SO4]NO3
Which of the following molecules is expected to rotate the plane of plane-polarised light?
In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of ∆o be the highest?
[Co(CN)6]3−
[Co(C2O4)3]3−
[Co(H2O)6]3+
[Co(H2O)6]3+
The coordination number and the oxidation state of the element ‘E’ in the complex [E(en)2(C2O4)]NO2 (where(en) is ethylene diamine) are, respectively,
6 and 2
4 and 2
4 and 3
4 and 3
The number of stereoisomers possible for a compound of the molecular formula CH3-CH =CH-(OH)-Me is
3
2
4
4
Which one of the following conformation of cyclohexane is chiral?
Twist boat
Rigid
chair
chair
In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
C2 → C2+
NO → NO+
O2 → O2+
O2 → O2+