Model for selectivity

Further insights into the relationships between structure and catalyst activity and selectivity have been achieved through variation of the three major components the anionic ligand the non-chelating NHC substituent and the nature of the chelating substituent. 

While these catalysts could effect metathesis with similar levels of Z-selectivity, they had lower levels of metathesis activity and caused significant amounts of olefin-migration 

---

T. Rebitzki, B. Delmon, and J.H. Block, Isothermal instability due to remote control A model for selective catalytic oxidation, AIChE Journal 41, 1543-1549 (1995). 

Prickett, T.A., T.G. Naymik and C.G. Lonnquist (19810. A random walk solute transport model for selected groundwater quality evaluations. Illinois State Water Survey, Bulletin 65. 

C. Wadsack, A. Hrzenjak, A. Hammer, B. Hirschmugl, S. Levak-Frank, G. Desoye, W. Sattler, and E. Malle. Trophoblast-like human choriocarcinoma cells serve as a suitable in vitro model for selective cholesteryl ester uptake from high density lipoproteins. Eur J Biochem. 270 451 -62 (2003). 

Hammarstrom, J. M. Smith, K. S. 2002. Chapter B, Geochemical and mineralogic characterization of solids and their effects on waters in metalmining environments. In Seal Ii, R. R. Foley, N. K. (eds) Progress on Geoenvironmental Models for Selected Mineral Deposit Types. US Geological Survey Open-File Report 02-195, US Geological Survey, Denver CO, USA. 

For simpler catechols employed in plant chemical defense we have synthesized and studied more complex analogs into which biological-receptor-site-directing functionality has been integrated to examine the potential of these redox-sensitive systems for inactivating targeted receptors. These modified catechols are models for selective receptor inactivation. 

Fig. 19. Structural model for selected parts of Ru(NHs)5 (histidine-33)-ferri-cytochrome c based on coordinates for tuna protein from ref. 81.

The ability of crown ethers to bind selectively to particular Group IA and Group IIA metal ions, because of the relationship between hole size and metal ion radius, has led to considerable interest in them in relation to membranes (models for selective ion transport), antibiotics (similar polyether structure), organic synthesis [solubilization of inorganic reagents leading to milder routes for oxidation (122), nucleophilic substitution (123), fluoridation (90)] and extraction of alkali... 

LeCluyse, E.L. Sutton, S.C. In vitro models for selection of development candidates permeability studies to define mechanisms of absorption enhancement. Adv. Drug Del. Rev. 1997, 23 (1-3), 163-183. 

All subsequent models for selectivity behaviour are, in some way or other, disguised in equation 5.29 the reason for this being that deviations from theoretical ideal behaviour as expressed through the values of resin phase activity coefficients, or by the interaction energetics required by a mechanistic model, are equivalent statements. In other words, the fundamental causal factors which determine selectivity plus any inadequacies in our understanding are all reflected in the adopted model whether thermodynamic or molecular. 

Reddy, D. R., Thornton, E. R. A very mild, catalytic and versatile procedure for a-oxidation of ketone silyl enol ethers using (salen)manganese(lll) complexes a new, chiral complex giving asymmetric induction. A possible model for selective biochemical oxidative reactions through enol formation. J. Chem. Soc., Chem. Commun. 1992, 172-173. 

Engineering-Science Inc., Cost Model for Selected Technologies for Removal of Gasoline Components from Groundwater Prepared by Engineering-Science Inc. for API, 1986. 

Conformationally Rigid Peptides as Models for Selective Herbicides... 

Asikainen, A.H., Ruuskanen, J. and Tuppurainen, K.A. (2005) Alternative QSAR models for selected estradiol and cytochrome P450 ligands comparison between classical, spectroscopic, CoMFA and GRID/GOLPE methods. SAR ej QSAR Environ. Res., 16, 555-565. 

Gonzalez Diaz, H., Bonet, L, Teran, C., De Clercq, E., Bello, R., Garcia, M.M., Santana, L. and Uriarte, E. (2007) ANN-QSAR model for selection of anticancer leads from structurally heterogeneous series of compounds. Eur. J. Med. Chem., 42, 580-585. 

Figure 14 Model for selectivity in thiophenolate-based Z-selective catalysts...

Prickett, T. A. Maymik, T. G. Lonnquist, C. G. A Random-Walk Solute Transport Model for Selected Groundwater Quality Evaluation. 1981, Illinois State Water Survey Bull. 65, 103... 

Prickett, T.A. Naymik, T.G. Lonnquist C.G. "A Random-Walk Solute Transport Model for Selected Groundwater Quality Evaluations" Bull. 65 111. State Water Survey Champaign,... 

Cost Model for Selected Technologies for Removal of Gasoline Components in Groundwater... 

Structure-Based Pharmacophore Model for Selective COX-2 Inhibitors... 

---