Inter structure sensitive

Transition temperatures are extremely "structure-sensitive", partly due to steric effects, partly due to intra- and inter-molecular interactions. 

It was also pointed out that ionic structures would contribute to a barrier. Thus a completely ionic structure with bare protons would give a value somewhat larger than the experimental potential. (The calculation is very sensitive to uncertainties in inter-... 

Metal carbonate decompositions proceed to completion in one or more stages which are generally both endothermic and reversible. Kinetic behaviour is sensitive to the pressure and composition of the prevailing atmosphere and, in particular, to the availability and ease of removal of C02. The structure and porosity of the solid product and its relationship with the reactant phase controls the rate of escape of volatile product by inter-and/or intragranular diffusion, so that rapid and effectively complete withdrawal of C02 from the interface may be difficult to achieve experimentally. Similar features have been described for the removal of water from crystalline hydrates and attention has been drawn to comparable aspects of reactions of both types in Garner s review [ 64 ]. 

Figure 6.6 Anthrocyanidins impart colour to many natural substances, such as strawberries and cherries. The choice of side chains can cause a huge change in the anthrocyanidin s colour. If the side chain is pH sensitive then the anthrocyanidin acts as an acid-base indicator structures of an anthrocyanidin at three pHs (red in high acidity and low pH, blue in low acidity and high pH and mauve in inter-midiate pHs)...

Most polymers do not form crystals suitable for single crystal X-ray diffraction, so powder or film methods are usually employed. X-ray and LJV data recorded at various temperatures provide the detailed information required to correlate conformational and electronic properties, since the former is sensitive to the inter- and intrachain packing, and the latter is sensitive to the conformation. DSC provides further evidence for any phase transitions. Detailed studies have been performed by Winokur and West,260 261 who reported a comparison of the polymorphism, structure, and chromism in poly(di- -octylsilylene), (Si- -Oct2), 89, and poly(di- -dccylsilylcnc)(Si- -Dcc2) , 90. These investigations will be described in detail for the useful insights into polysilane structures that they afford. 

The structure of the Ion pair complex Is also sensitive to the anion, especially the extent of charge delocalization and the presence of substituents close to the anionic site. Loose Ion pair formation requires a considerable increase In the inter-ionic Ion pair distance, and a charge localized anion, therefore. 

Thus, it is seen that noncomputer, spectral results have been used in numerous investigations on vibrational spectra-structure relationships. When such complex molecules as carbohydrates, which are sensitive to the environment and reveal configurational and conformational changes, as well as intra- and inter-molecular hydrogen-bonding, are dealt with, the noncomputer techniques, even though more qualitative and less rigorous than the calculation methods, remain quite useful in practice. 

This indicates that the 170 NMR parameters are potentially sensitive to changes in the conformation of backbone chains in peptides and proteins.74 The prediction from the above results is that the magnitudes of 170 NMR parameters are the sum of intra- (e.g. secondary structures) and inter- (e.g. hydrogen bonds) molecular interactions. Therefore, in a real biological system, the effects of the two interactions on the NMR parameters should be separated from each other. In the above three examples, only the dependence of the Cq values are discussed. Of course,... 

C-C bond dissociation energies are not the only molecular properties affected by electron transfer. In addition, radical cations exhibit a number of unique characteristics flexible structures [23], a low sensitivity towards steric effects [24], low activation barriers for inter- and intramolecular reactions [25-28], high acidities [29-32] and the inversion of the thermochemical stability order for certain tautomeric systems. Examples in the recent literature demonstrate that it is worthwhile thinking about how the changed molecular properties can be used for the design of new reactions that complement the thermal and photochemical reactivity patterns [26,33-35]. 

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