Mixing character

Hybridization can be of mixed character and the bond angles ia compounds can vary from ideal orientations of the pure hybrid. 

The (I)-(III)-samples sorption ability investigation for cationic dyes microamounts has shown that for DG the maximum rate of extraction is within 70-90 % at pH 3. The isotherm of S-type proves the physical character of solution process and a seeming ionic exchange. Maximal rate of F extraction for all samples was 40-60 % at pH 8 due to electrostatic forces. The anionic dyes have more significant affinity to surface researching Al Oj-samples comparatively with cationic. The forms of obtained soi ption isotherms atpH have mixed character of H,F-type chemosorption mechanism of fonuation of a primary monolayer with the further bilayers formation due to H-bonds and hydrophobic interactions. The different values of pH p for sorbents and dyes confirm their multifunctional character and distinctions in the acid-base properties of adsoi ption centers. 

At this stage, type (1) is more apparent than type (2), and we provide some preliminary discussion of (2) here. Flow characteristics include relative times taken by elements of fluid to pass through the reactor (residence-time distribution), and mixing character-... 

Similar investigations were carried out using 2-propanol as the organic modifier instead of 1-propanol. The parameters of linear regression analyses are compiled in Table 3.5. It has been concluded from the results that the retention on both stationary phases is of mixed character hydrophilic, electrostatic and steric molecular parameters are equally involved in the retention [83],... 

In the present work the Cl procedure ( ) employed includes single, double, and higher excited configurations, and can treat in a natural way, using the localized monomer basis orbitals, intra- as well as inter-molecular excitations. States which arise from such monomer-based excitations can then be interpreted in terms of their locally-excited, excitonic, CT, or "mixed" character. Details as to the nature of the dimer states have been discussed in our earlier works (7, 8). 

The spectra of the complexes LmM"+l R, containing a metal-carbon -bond, usually consist of several distinguishable bands the major bands with high extinction coefficients in the UV region are LMCT bands, followed sometimes by bands with mixed characters and the d-d bands in the visible region with low extinction coefficients. The location of the maximum of the LMCT transition is naturally strongly affected by the nature of the substituents R and by the redox potential of the central M(ra + 1) ions. 

An alternate explanation for the rapid rate of intersystem crossing in aromatic ketones is that 17,17 triplet levels lie between the singlets and the ,77 triplets,369 and Kearns has interpreted some T S absorption spectra as indicating two such low-lying triplets.105 However, even if two triplets do lie beneath the lowest singlet, the chemical reactivity of the lowest triplet would not be expected to change unless the two triplets were of mixed character. 

The effect of coordination on structural parameters is paralleled by the changes in vibrational frequencies assigned as CO and CN stretching. The modes are actually of mixed character,61 but the wavenumber of the band around 1700 cm -1, traditionally called CO stretching, drops by ca. 30 cm-1 on coordination whilst the CN stretching band moves to higher wavenumber,62 as shown in Table 4. 

In all other cases with 0 < < tt/2 no relations of the form e = 0 and e - n2 =0 can be derived from Eq. (11.32). This means that only for the limiting cases t = 0 and = 7r/2 do pure LO and TO phonons exist. In all other directions the eigenvibrations have a more or less mixed character. 

L. Oliveros, C. Minguillon, B. Desmazieres, and P.-L. Desbene, Preparation and evaluation of chiral HPLC stationary phases of mixed character for the resolution of racemic compounds, J. Chromatogr., 543 211 (1991). 

The band system is schematically represented in Figure 2.1 [35], The difference in the band structures are the position of the Fermi level, which increases in energy from Ti to Zn, and the band width in addition, these d-electrons have a mixed character, that is, they can move as free electrons, as well as exhibit a localized character [10],... 

In the central part of the bay, the salinity changes within the limits 3-7 psu. Here, the composition of plankton features a mixed character. Along with brackish-water and freshwater forms, marine forms are also encountered. 

Electronic transitions and excited states of metal complexes are traditionally described in terms of text-book categories such as MLCT, LLCT (XLCT), IL, MC (=LF or dd), LMCT, etc. It was mentioned several times above that MLCT, LLCT, and IL characters in the case of [Re(L)(CO)3(N,N)] represent only limiting cases. In reality, electronic transitions and excited states have mixed character owing to two factors (1) delocalization of the optical orbitals (i.e., frontier orbitals involved in electronic transitions), and (2) combining several one-electron excitations in an electronic transition. 

The photon yield is sensitive to the total pressure reaching a maximum of 0.2 per molecular reaction with 10-15 torr of argon added. Jones and Broida [428] suggest that nonradiating states are formed initially and Ar induces transitions into through levels of mixed character that are known from spectroscopic observations. 

As pointed out in Section II-3, numerical modelling of viscoelastic flows leads to numerical difficulties related to the mixed character (elliptic - hypeiholic) of the constitutive equation, to the propagation of "stress singularities" and to the so-called "High Weissenberg Number" problem. 

Dislocations of mixed character. Image profiles for dislocations of mixed character have been calculated by Howie and Whelan (1962). For g b = 1, the images are similar to those of screw and edge dislocations but of intermediate width. 

In its simplest form, this matching of observation and theoretical prediction involves finding diffraction vectors g for which the dislocation is invisible (or very weak) and determining the direction of b by assuming that the condition g-b = 0 is satisfied. However, g b = 0 is a sufficient condition for invisibility only for a pure screw dislocation, and the invisibility of a pure edge dislocation also requires g b x u = 0. Thus, invisibility of a dislocation of mixed character is not expected for any reflection, even though the condition g b = 0 is satisfied, because g b x u 0. The... 

Spectroscopic studies of aqueous solutions of silver ion-olefin complexes have not yielded much useful data. Electronic spectra have been obtained for the aqueous systems AgClO 4-styrene (426) and AgClO 4-cyclohexene (296). The latter shows a charge-transfer band at 220-230 mp which has been observed to have the mixing character of the... 

---