The type of molecular orbitals in the allyl ligand (CH2=CH-CH2-) that are used for σ-donation and π-back donation with metal d-orbitals, respectively are
Allyl ligands can donate sigma electrons and pi electrons. They are also good pi acceptors due to the availability of anti-bonding π* orbitals.
The Hückel method or Hückel molecular orbital theory, is a simple method for calculating molecular orbitals as linear combinations of atomic orbitals.
The last orbital which is unoccupied can accept pi electrons.
Consider following statements regarding the magnetic moment of the 3d transition metal complexes:
A. Octahedral complexes of (high spin) and (high spin) have approximately equal to their values.
B. Tetrahedral complexes of and octahedral complexes of have orbital contribution added to their magnetic moments.
C. Orbital contribution is quenched for metal ions having A or E ground state.
D. Octahedral complexes of have value at 300 K due to orbital contribution added to their magnetic moments
Choose the correct answer from the options given below:
The possible terms arising from a p1d1 configuration are
For octahedral geometry the triad with no net gain in CFSE, when the ligand field changes from weak to strong, is:
The correct statement for the CO and ligands in the complexes trans – and is:
The correct pair among the following, in which each species shows orbital contribution to its magnetic moment is
The red colour of the gem, ruby is predominantly due to
The value of magnetic moment will be independent of temperature for
(acac=acetylacetonato; OAc=acetate; o-phen=o-phenanthroline; Pz=pyrazolyl)
The number of expected electronic transitions in [Cr(en)3]3+ and trans-[Cr(en)2F2]+ at 4 K is, respectively (en=ethylenediamine)
The products A and B for the given reaction
are, respectively
