Coordination compounds magnetism

Magnetically perturbed Mossbauer spectra of iron and tin coordination compounds. W. M, Reiff, Coord. Chem. Rev., 1973,10, 37-77 (138). 

Magnetic Properties of Organometallic and Coordination Compounds of Plutonium... 

C20-0094. In octahedral geometry, the amount of magnetism m -cf coordination compounds of the 3d... 

The infrared spectra suggest bidentate dithiocarbamate coordination, the magnetic susceptibility is markedly field-dependent. Although the compound is monomeric in CHCI3, a molar conductance in nitromethane is found, which increases sharply on dilution, attributed to a weak electrolytic character. Accordingly, the authors formulate this compound as [Nb2(Et2r/tc)sBr2]Br. 

Konig and others published in the 1970s an impressive series of studies on six-coordinate iron(II)-bis-phenanthroline complexes [160-164] for which they inferred 5=1 from thorough magnetic susceptibility and applied-field Mossbauer measurements. Criteria for the stabilization of the triplet ground state for six-coordinate compounds with tetragonal ( >4 ) and trigonal ( >3 ) symmetry were obtained from LFT analyses [163], The molecular structures, however, were not known because the materials could not be crystallized. 

Although the simple valence-bond approach to the bonding in coordination compounds has many deficiencies, it is still useful as a first attempt to explain the structure of many complexes. The reasons why certain ligands force electron pairing will be explored in Chapter 17, but it is clear that high- and low-spin complexes have different magnetic character, and the interpretation of the results of this technique will now be explored. 

Gillard, R. C., The Cotton Effect in Coordination Compounds Gillespie, Ronald J., see Sawyer, Jeffery F. Glasel, Jay A., Lanthanide Ions as Nuclear Magnetic Resonance Chemical Shift 7 215... 

Vlek, Antonin A., Polarographic Behavior of Coordination Compounds. Vrieze, K. and van Leeuwen, P. W. N. M., Studies of Dynamic Organometallic Compounds of the Transition Metals by Means of Nuclear Magnetic 5 211... 

Ciofini, I. and Daul, C. A. 2003. DFT Calculations of Molecular Magnetic Properties of Coordination Compounds , Coord. Chem. Rev.. 238, 187. 

All the monomeric molybdenum(III) complexes are paramagnetic, and in Table l5 the magnetic moments of some typical examples are given. For six-coordinate compounds the values lie between 3.53 and 3.86 BM, with most in the region 3.7 to 3.8 BM as predicted for octahedral d3 complexes.37 The value of 1.73 BM in ELt[Mo(CN)7] 2H20 is consistent with a spin-doublet ground state d3 system.3S... 

Chapter 11 Coordination Chemistry Bonding, Spectra, and Magnetism 387 Bonding in Coordination Compounds 391 Valence Bond Theory 391 Crystal Field Theory 394 Molecular Orbital Theory 413 Electronic Spectra of Complexes 433 Magnetic Properties of Complexes 459... 

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