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Spinning factor affecting

Further, in a qualitative sense, the spinning factors affecting orientation are temperature history, spinning rate, fiber diameter, and polymer nature. [Pg.461]

We (as well as many others (4-8), for reviews see (9,10)) have been interested for some time (11,12) in the effect of spin-state changes on reactivity. In particular, we have used computational methods to explore these effects in transition metal chemistry ((13-15), for reviews see (10,16)). The key factor affecting reactivity is the relative energy at which the zeroth-order potential energy surfaces corresponding to the individual spin-states cross (Scheme 2). This factor will determine, among other things, whether spin-forbidden reactivity is competitive with... [Pg.574]

For transition metals the multiplicity of the spin state affects the way in which the anions can approach the cation this alters the effective radius. Although this is an important factor in determining cationic radii, it is beyond the scope or the present chapter and will be deferred to Chapter ll. [Pg.605]

Several factors affect intensities of crystal field spectra. In addition to enhancement by increased temperature and pressure discussed in chapter 9 ( 9.4), intensities of absorption bands depend on first, the spin-state or number of unpaired electrons possessed by a transition metal ion second, whether or not the cation is located at the centre of symmetry of a coordination site and third, interactions with next-nearest-neighbour cations. [Pg.64]

Ohnischi, S., J. Ikeda, M. Kaschiwage, and I. Nitta Electron spin resonance studies of irradiated polymers 1. Factors affecting the electron spin resonance spectra of irradiated polymers. Polymer 2, 119 (1961). [Pg.710]

For the evaluation of the main contributions of various factors affecting IS values on the basis of the partial IS (PIS) additivity principle in pseudo- and octahedral low-spin iron(II) complexes, the expected ISs of nioximates and phenanthrolinates were calculated. [Pg.186]

For cobalt, iron, and ruthenium sarcophaginates, the Log kn values increase with an increase in the redox potentials. This is the case when the main factor affecting a variation in both values in the same direction is the electronic configuration. The increase in E values in a series of clathrochelates from cobalt to ruthenium is attributed to differences in spin states Is > hs for cobalt. Is > hs, Is for iron. Is > Is for ruthenium complexes. The increase in Logftii values correlates with ALFSE for +3 and +2 oxidation states. [Pg.301]

Regarding quantitation in the CP/MAS experiment, for peak areas to accurately represent the number of nuclei resonating, one of the conditions that must be met is that the time constant for cross polarization must be significantly less than the time constant for proton spin lattice relaxation in the rotating fi ame, Tch or Tnh TipH. Other factors affecting quantitation in CP/MAS have been discussed in several reviews (28-33). Since no analyses of the spin dynamics were performed in this study, the solid state spectra presented in this manuscript will be interpreted only semiquantitatively. [Pg.309]


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See also in sourсe #XX -- [ Pg.335 ]




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