Question

2. a. Draw and show the crystal field splitting of the d orbitals in an octahedral complex, a tetrahedral complex, and in a square planar complex.(clearly label the orbitals) b. Explain the difference in the following crystal field splitting values (1) Co(NH3).]2+ 10200 cm"! : [CO(NH3).]* 22,900 cm (ii) [Cr(H20).]** 17,400 cm. ; [Cr(CN).]3-26,600 cm (iii) [MnF6]?- 22,200 cm-"; [ReF.]?- 27,800 cm- (iv) [Co(NH3).]2+ 10,200 cm '; [Co(NH3)4]2+ 5,900 cm c. Draw and show the filling of 6 d electrons in a strong field octahedron complex, a weak field octahedron complex and in a tetrahedron complex.

Answer 1

2.ca), 1. In octahedral field ( ligands approaches along the aner) dit-y dz² all along the molecular on ares more destabised) . . ... El - - - - dzy dyz dez dz-y" da No field free metalion day dyz dan H2g) on 2g) in between molecular octahedral axes. field (inclose situation) roalles in between In approaches in hetes tetrahedral fied. nd Cligand aps day dyz dantz E day dyz dan da zyr da? at e chizyt den

square planer field ,.- da? y... | day dyå az x drifyr der . - de 26). I [cocomo). 72" and Co (093) 359 due to +3 Change in the complex of cobalt the high CASE value as well as high to value, so the splitting is large for I (") As we know the strong field leg and also able to ince are the ho gap, so in the case of [co (CN)6] en being strong field lig and than to making more energy difference between the try and eg set of orbital (ii) As we know on going from 3d to yt tost the to value increases for 3d to 4d (1251) and 4d to 50 (587.). So prom un to be the so value is high (3d) (50) which also reflect in splitting value.

26.au) 4+= 440 As Tetral hedral complex is surrounded by a ligants here as octatedral complex sumoune by 6 ligands, which make the splitting more for octahedral complex. an for [co (NH3) 72 than [co (NH3)4] 27 2.61. Strony field octahedral complex do ) --eg tog eg I AL AL AL Hg (stog field makes high to and the electon set pained) Complex octahedron weak field do =) - A Aeg 441 thg tagy egr w eak fielt tetrahedral d622 + bn Atte éping