10/18/2021 0 Comments Nmr Of Cu(Dmg)2
(5) The coordination number is 6. (4) The complex is diamagnetic. (3) The complex is d 2 sp 3 hybridized. (2) The complex is an outer orbital complex. Which of the following statements are true (1) The complex is octahedral. (Valence Bond Theory) The coordination complex, Cu(OH 2) 6 2+ has one unpaired electron.The environment around Cu(1) and Cu(2) is distorted square pyramidal with four oximate nitrogen atoms building the equatorial plane. The configuration around the zinc atom is distorted trigonal bipyramidal with four oximate oxygens from two - fragments (each one acting as a bidentate ligand through its deprotonated oximate oxygens in cis positions) occupying one axial and the three equatorial positions and an additional oximate oxygen from a symmetry-related - fragment filling the remaining axial position. The structure consists of a chain of neutral trinuclear units and noncoordinated H 2dmg and water molecules. It crystallizes in the triclinic system, space group P1̄, with a = 11.414(1) Å, b = 11.992(3) Å, c = 12.567(10) Å, α = 91.27(6)°, β = 111.46(2)°, γ = 112.24(2)°, and Z = 2. Nmr Of Cu Dmg 2016 Two-dimensional nuclear magnetic resonance spectroscopy ( 2D NMR ) is a set of nuclear magnetic resonance spectroscopy (NMR) methods which give data plotted in a space defined by two frequency axes rather than one.A new heterotrinuclear complex of formula ♰.5H 2dmg·H 2O (C 18H 34Cu 2N 9O 11Zn, 1) (H 2dmg = dimethylglyoxime) has been synthesized and its crystal structure determined by single-crystal X-ray diffraction.The Knight shift of the nondeuterated specimen, which is metallic in the whole temperature range, is not scaled to the total spin susceptibility. The only efficient exchange pathways responsible for the overall ferromagnetic coupling in 1 are the diamagnetic zinc(II) ion and the out-of-plane double-oximato bridge, the magnitude of the magnetic coupling between the copper(II) ions through these bridging units being 3.9 and 5.1 cm - 1, respectively.The electronic states of a series of (DMe-DCNQI)2Cu systems with nondeuterated and partially deuterated methyl groups in a DMe-DCNQI molecule have been investigated by 13C NMR measurements at the cyano carbon sites. The field dependence of the magnetization at 2.0 K is consistent with a low-lying quintet state. 1 exhibits a characteristic ferromagnetic behavior with a continuous increase of the χ M T product as the temperature is lowered from 300 to 2.0 K. The Cu(1)··♼u(2), Zn(1)···Zn(1) i, and Cu(2)··♼u(2) ii separations are 5.506(2), 3.390(2), and 3.930(2) Å, respectively. The trinuclear units are repeated through inversion centers standing at the middle of the Zn(1)···Zn(1) i and Cu(2)··♼u(2) ii vectors leading to a chain which runs parallel to the diagonal of the ac-plane.
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