THEORETICAL STUDYOF THE [Fe(enb(NCSb] COMPLEXWITH REPARAMETERIZED DENSITYFUNCTIONALS

• Main Author: Perpustakaan UGM, i-lib
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2009
• Subjects: Jurnal i-lib UGM
• Online Access: https://repository.ugm.ac.id/28033/; http://i-lib.ugm.ac.id/jurnal/download.php?dataId=11096
• Institution: Universitas Gadjah Mada

ABSTRACT Quantum chemical studies have been carried out on the Fe(enMNCSh (en = ethylenediamine)complex both in low and high spin states (S = 0 and S = 2) using hybrid exchange-correlationfunctional (B3LYP) and non-hybrid method (BLYP). Calculationswere performed in vacuum and in methanol to study the effect of cis-trans geometry on the structure and energy difference between low-spin (LS) and high-spin (HS) states of iron (1/)complexes. Full geometry optimizations of the complexes show that hybrid method consistently gives higher energy difference between LS and HS states than the nonhybrid methods. Calculations with reparameterizeddensity functional theory that showed more reasonable electronic energy splittings in previous res~arch was also carried out. In addition, the computational study of Fe(en)2(NCS)2in vacuum and methanol with PCM method showed that the complexes tend to adopt cis geometry. This geometry showed much less charge transfer in the substitutions of NCS ligands compare to trans geometry. Keywords: Electronic structure, spin states, density functional, frontiers orbitals