Subject: Inorganic Chemistry · Chapter: Coordination Chemistry · Topic: Coordination Chemistry – General · Exam: NET JUNE 2015 · Marks: 2 · Difficulty: Medium
The complex $\left[\mathrm{Fe}(\text{phen})_{2}(\mathrm{NCS})_{2}\right]$ (phen 1,10-phenanthroline) shows spin cross-over behaviour CFSE and at $\mu_{\mathrm{eff}}$ 250 and 150K, respectively are
(a)$0.4\Delta_{0}$, 4.90 BM and $2.4\Delta$,, 0.00 BM
(b)$2.4\Delta_{0}$, 2.90 BM and $0.4\Delta$, 1.77 BM
(c)$2.4\Delta_{0}$, 0.00 BM and $0.4\Delta$, 4.90 BM
(d)$1.2\Delta_{0}$, 4.90 BM and $2.4\Delta$. 0.00 BM