INDEX complex stability

Toropov AA, Toropova AP (2002) QSPR modeling of complex stability by optimization of correlation weights of the hydrogen bond index and the local graph invariants. Russ. J. Coord. Chem. 28 877-880. 

Thermodynamic parameters have greater utility than equilibrium constants (Kc). The majority of workers use AHd, the enthalpy of dissociation, as the index for complex stability, which can be derived from the variation of Kc with temperature T ... 

Nieboer, E., and McBryde, W.A.E. Free energy relationships in coordination chemistry III. A comprehensive index to complex stability. Can. J. Chem. 51, 2512-2524 (1973). 

The index of stability obtained by directly comparing the saturation pressures of two complexes was biased by the volatility of the free donor... 

The stability and shelf-life of effervescent powders are essentially assured by protection against external moisture. Single-dose sachets are manufactured with suitable complexes to prevent premature reaction caused by external moisture or excess internal moisture from the granulation process. Special stability studies under different conditions are required for these powders. The dissolution time must be less than 3 min this is an index of stability. 

Note The more common rock-forming minerals are italicized (cf. Deer et ai. 1992). Single pATjp values are presumably for well-crystallized, least soluble forms. Where p/T p ranges are given, they reflect the solubility range between relatively amorphous and well-crystallized forms, values have been computed assuming specific solution speciation models (e.g., specific complexes and complex stability constants), which must also be used when these constants are employed in mineral saturation index calculations. 

Simple linear relationships developed between the quantum chemical indexes of organic molecules (their maximum charges and energies of the frontier orbitals) and their empirical donor acceptor parameters as well as the heats of the hydrogen-bonded complexes formation with silica surface OH groups or the chemisorption activation energies on this surface may be used for estimation of the complexes stability and reactivity of organic compounds towards Bronsted sites of other oxide surfaces. The electron donor ability of... 

Many authors have concluded that the conjugated diene method might be used as an index of stability of lipids in place of, or in addition to PV. It is faster than iodometric PV determination, much simpler, does not depend on chemical reactions or color development, and requires a smaller sample size. However, the presence of compounds absorbing in the region of the conjugated diene formation may interfere with such determinations. It has been proposed that interference in complex systems can be minimized or eliminated by derivative spectroscopy, using photodiode detection of spectra and computer analysis of the data. ... 

The Michaelis constant (fCM) is an index of the stability of an enzyme-substrate complex. Does a high Michaelis constant indicate a stable or an unstable enzyme-substrate complex Explain your reasoning. 

The Davison SOx Index of a catalyst decreases with increasing regenerator temperature. We have observed this for all the materials we have tested. These materials covered a variety of chemical compositions. This effect of temperature is believed to be due to the thermodynamic stability of the sulfate-type complex on the surface of the catalyst. Data are shown in Figure 4 for DA-250 + 10% Additive R. 

In the three-branch horseshoe, the periodic oibit 0 is hyperbolic with reflection and has a Maslov index equal to no = 3 while the off-diagonal orbits 1 and 2 are hyperbolic without reflection with the Maslov index n = 2 [10]. Fitting of numerical actions, stability eigenvalues, and rotation numbers to polynomial functions in E can then be used to reproduce the analytical dependence on E. The resonance spectrum is obtained in terms of the zeros of (4.16) in the complex energy surface. 

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