A purely vibrational insight on the tetragonal distortion of [Cu(DMF)6](2+)
Aaron I Freire1, Wagner A Alves1
1Departamento de Química Inorgânica, Instituto de Química, Universidade Federal do Rio de Janeiro, Caixa Postal 68563, Rio de Janeiro, RJ 21941-909, Brazil.
Abstract:
Raman spectra of N,N-dimethylformamide (DMF) solutions containing copper perchlorate at different compositions have been recorded. The spectral changes exhibited at the rmethyl region of DMF, in the presence of the Cu(II) salt, were reported for the first time. A correlation with the δOCN region is made. The quantitative Raman analysis performed at the rmethyl region allowed the determination of an average number of 6 DMF molecules per Cu(II) in the first solvation shell. This value as combined to the spectral variations observed in both regions of DMF allow us to propose the existence of axial bond lengths longer than equatorial ones in the octahedron. The spectra also reveal that the counter-ion is not capable of affecting the stability of the [Cu(DMF)6](2+) complex for the whole investigated concentration range.
More Related Videos
08:44Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
Published on: August 22, 2017
09:06Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Related Concept Videos
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than...
01:24IR Spectroscopy: Molecular Vibration Overview
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
01:08IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations
02:58Crystal Field Theory - Octahedral Complexes
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
01:16IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
According to Hooke's law, the vibrational frequency is directly proportional to...
02:11Conformations of Cyclohexane
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...