question_answer 89)

    Using valence bond theory, explain the following in relation to the complexes given below (a) Type of hybridisation (b) Inner or outer orbital complex (c) Magnetic behaviour (d) Spin only magnetic moment value.

Answer:

                    (a) (i)  hybridisation (ii) Inner orbital complex because (n - 1) d-orbitals are used. (iii) Paramagnetic, as two unpaired electrons are present. (iv) Spin only magnetic moment (b) ( pair up the unpaired 3d electrons.) (i) d2sp3 hybridisation (ii) Inner orbital complex because of the involvement of (n -1) d-orbital in bonding, (iii) Diamagnetic, as no unpaired electron is present. (iv) (c) (i)  hybridisation (ii) loner orbital complex (as (n - 1)o'-orbital take part.) (iii) Paramagnetic (as three unpaired electrons are present.) (iv) (d) (i) hybridisation (ii) Outer orbital complex because nd-orbitals are involved in hybridisation. (iii) Paramagnetic (because of the presence of four unpaired electrons). (iv)