Direct Observation of Fine Structure Transitions in a Paramagnetic Nickel(II) Complex Using Far-Infrared Magnetic Spectroscopy: A New Method for Studying High-Spin Transition Metal Complexes
Citations Over TimeTop 10% of 2003 papers
Abstract
Novel far-infrared (FIR) absorption spectroscopy in conjunction with multiple, fixed external magnetic fields (FIR magnetic spectroscopy, FIRMS) has been used to investigate pseudotetrahedral complexes with the formula M(PPh(3))(2)Cl(2) (M = Ni, Zn; Ph = C(6)H(5)). Crystal structures have been reported for the Ni complex; we report the structure of the Zn complex. Transmission spectra at 5 K of Ni(PPh(3))(2)Cl(2) (S = 1) at zero magnetic field exhibit absorption bands at 11.41, 15.28, and 23.0 cm(-1). The two lower frequency bands show great sensitivity to external magnetic field, and their field dependence is as expected for electron spin transitions allowing precise determination of the following parameters: |D| = 13.35(1) cm(-1), |E| = 1.93(1) cm(-1), g(x,y) = 2.20(1), g(z) = 2.00(1). Corresponding spectra of Zn(PPh(3))(2)Cl(2) (S = 0) exhibit bands only at >20 cm(-1), which show no field dependence. FIRMS is a promising technique for direct investigation of the electronic structure of high-spin transition metal complexes.
Related Papers
- → Expanding the utility of NMR restraints with paramagnetic compounds: Background and practical aspects(2011)175 cited
- → Diazadien-Nickel-Komplexe, I: Bis(diazadien)-nickel(O) und Bromo-diazadien-nickel(I) / Diazadiene Nickel Complexes, I: Bis(diazadiene) Nickel(O) and Bromo-diazadiene Nickel(I)(1978)50 cited
- → Unusual paramagnetic centers in PbTe undoped crystals(2014)1 cited
- → Effects of nickel source material on characteristics of nickel/alumina impregnated catalysts.(1987)5 cited
- → Paramagnetism(2015)