Question

3. Calculate a value for Her for [Ni(en)]2+ taking into account spin-orbit coupling. Compare your answer with us and the value of 3.16 BM observed experimentally for [Ni(en)3](SO4). Given: 2 = 315 cm | 4. = 11,500 cm '; a = 4 for an A GS term; 2 for an E GS term.

Answer 1

The given complex is [Ni(en)3]²⁺ where en is ethylene diamine ligand which is strong field ligand.

* Given :- 2.82 ulso = 316 BM. I for a, we have [Ni(en)3] complex ie Nit (2²) system. x=4 . 1 og Chere elechon will paid x=315cm' ertag beause en is strong - 11,500cm field ligand) lefs= ? L = +4+2+0 -1- 4 = 47=33F Formula:- 25+1 = 2(1)+1=33 3F term x=4. Meff= ulso (1-x2) + 2 +1 O -1 -2 Also I nen+2) Where. n = no of unpaired election na 2 - 12(2+2) Luso =2.82BM Now, eleff=2-82(1-4X-315) 11,500 11,00 = 2.8af1-4-12602) - 2.82 (1+0.1095) = 2:82x1,1085 feet = 312.BM) The value of left for [Ni(en)3] and [Nilen), 7(504) are quite similar jie 3.16~ 3 12 BM