Fields strong

Weinacht T C, White J L and Bucksbaum P H 1999 Toward strong field mode-selective chemistry J. Phys. Chem. A 103 10 166-8... 

Depending on tire sign of U and F, atoms in states whose energy increases or decreases witli magnetic field are called weak-field seekers or strong-field seekers , respectively. One could, in principle, trap atoms in any of tliese states. 

Weak-field, high-spin Strong-field, low-spin- ... 

Figure 7.40 (a) Weak-field, high-spin and (b) strong-field, low-spin configurations in d, d, d ... 

The niobium-zirconium wire used remains superconducting at 4° K. even in the strong field of the solenoid itself. The unique feature of the new apparatus is the very high field homogeneity in the sample region (2 cm. diameter sphere) kept at room temperature (34). 

Give the number of unpaired electrons in octahedral complexes with strong-field ligands for... 

Electro-optic The liquid crystal plastics exhibit some of the properties of crystalline solids and still flow easily as liquids (Chapter 6). One group of these materials is based on low polymers with strong field interacting side chains. Using these materials, there has developed a field of electro-optic devices whose characteristics can be changed sharply by the application of an electric field. 

The electronic structure of transition metal cluster complexes with weak- and strong-field ligands. G. P. Kostikova and D. V. Korol kov, Russ. Chem. Rev. (Engl. Transl.), 1985,54, 344 (137). 

Predict the electron configuration of an octahedral eP complex with (a) strong-field ligands and (b) weak-field ligands, and state the number of unpaired electrons in each case. 

STRATEGY Decide from their positions in the spectrochemical scries whether the ligands are weak-field or strong-field. Then judge whether the complex is high spin or low spin. 

FIGURE 16.35 (a) A strong-field ligand is likely to lead to a low-spin complex (in this case, the configuration is that of Fe3+). (b) Substituting weak-field ligands is likely to result in a high spin complex. 

For a strong-field ligand, predict a low-spin [Fe(CN)6J4 will have no unpaired... 

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