Magnetic susceptibility effective moment

Figure 2 Magnetic dipole field outside a sphere of a diamagnetic material with dipolar moment m induced by the external field Bq (A) static sample (B) rotating sample. (Reproduced with permission from Wind RA and Hu JZ (2003) Magnetic susceptibility effects in nuclear magnetic resonance spectroscopy of biological objects. In Recent Research Developments in Magnetism and Magnetic Materials, vol. 1, pp. 147-169.)...

Microwave spectra obtained from PHgD and PHDa in a magnetic field of about 25 kG showed Zeeman effects, from which molecular g values were calculated. They were 20 times smaller than those for ammonia. The molecular quadrupole moments of phosphine and ammonia were approximately the same. Magnetic susceptibilities and molecular quadrupole moments were also compared. 

Breslow etal.133 investigated the microwave spectrum of cyclopropenone and determined data for bond lengths, bond angles, dipole moment (4.39 D from the molecular Stark effect), and magnetic susceptibility anisotropy (Ax) as seen in Table 5 in comparison with cyclopropene5 3 ... 

The inverse magnetic susceptibility and the effective magnetic moment, jueff, of [Fe(HC(3,5-(CH3)2pz)3)2](BF4)2 are shown in Fig. 16 where it is immediately obvious that the magnetic properties of this complex are quite unusual [46]. Above ca. 210 K the eff of ca. 5.0 is clearly that expected of a high-spin iron(II) complex. But below ca. 190 K the moment decreases to a substantially lower value of ca. 3.7 /uB. Further, at ca. 90 K there is a small irreversible change in susceptibility and moment, a change that is associated with crystal reorientation in the applied field. The reason for the abrupt decrease in the moment at ca. 200 K to ca. 3.7 becomes apparent from a study of the Mossbauer spectra of [Fe(HC(3,5-(CH3)2pz)3)2](BF4)2. 

Fig. 16 The temperature dependence of the inverse molar magnetic susceptibility, a, and the corresponding effective magnetic moment, b, of [Fe(HC(3,5-(CH3)2pz)3)2](BF4)2. Data obtained from [46]...

An additional, independent estimate of the concentration of paramagnetic superoxo and diamagnetic hydroperoxo-/peroxo-titanium species was made from magnetic susceptibility measurements using a Lewis coil force magnetometer (52). The gram-susceptibility of Ti in TS-1 + H2C>2 was estimated to be 5.5 X 10-6 emu/g, which corresponds to an effective magnetic moment of... 

Magnetic Properties. The magnetic susceptibilities of the ferrous and ferric porphyrazines 11,13, and 16a-d are reported in Table IV. For 11, which is a square-planar d6 system, the effective moment of 3.82 is consistent with a... 

Magnetic Susceptibility and EPR Data. The temperature dependent magnetic susceptibility and EPR of the S -ethylporphyrazines were measured and the effective magnetic moments ([teff), spin, and J values are reported in Table XIV (113, 116). 

The theory of the magnetic susceptibility of nickel(II) complexes is well established and several review articles have already appeared.375-379 A quantity of interest in studying the magnetic properties of nickel(II) complexes is the effective magnetic moment p = (8xT). 

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