Complex Configurations

The treatment of the lithiated allyl sulfoximines E-15 with 1.1-1.2 equiv of ClTi(NEt2)3 at -78 to 0°C in THF or ether afforded the corresponding mono (allyl) titanium complexes E-19 in practically quantitative yields (Scheme 1.3.7) [14, 16]. Similarly the Z-configured complexes Z-19 were obtained from the Z-configured allyl sulfoximines Z-15. Reaction of the titanium complexes E-19 with aldehydes at -78 °C took place at the a-position and gave the corresponding homoallyl alcohols 6 with >98% diastereoselectivity in medium to good yields (Scheme 1.3.8) [14, 16]. 

For a same molecular ratio of aqueous NaY solutions (Y = OH, Cl), experimental data underlines specific effects of nascent OH radicals on transient UV and near-IR electronic configurations. Complex investigations of PHET reactions in the polarization CTTS well of aqueous CT and OH ions are in progress. We should wonder whether a change in the size of ionic radius (OH -1.76 A vs Cl" 2.35 A) or in the separation of the energy levels influence early branchings of ultrafast electronic trajectories. A key point of these studies is that the spectroscopic predictions of computed model-dependent analysis are compared to a direct identification of transient spectral bands, using a cooled Optical Multichannel Analyzer... 

Mononuclear heterocarbonyl complexes usually adopt either a tj1 or a rf configuration. Complexes of d6 metal-ligand fragments such as M(CO)5 or MLiL2(775-C5H5) may be regarded as borderline cases between rf and rf preferences. The coexistence of the two forms was reported for the first time in 1984.44 An equilibrium between rf and rf isomers of [M(CO)5 Se=... 

In addition to bridging square arrays of metal, E fragments may also adopt a /As-configuration. Complexes of this type have been summarized ... 

Membrane reactor models of various configurations, complexity, and ranges of applicability have been previously reported [Sun and Khang, 1988 Itoh and Govind, 1989 Liu et al., 1990], Several previous investigators have presented water-gas shift membrane reactor models. A model of the iron-chromium oxide catalyzed water-gas shift reaction at 673 K in a cylindrical, palladium membrane reactor was developed to demonstrate... 

Due to availability of 2D and 3D Monte Carlo procedures the quantification of neutral particle (atomic, molecular and surface-) effects on the divertor performance in fusion devices is presently limited by the availability of atomic and molecular data as well as of surface interaction data, not by the configurational complexities nor by computational restrictions. 

Complexes containing a TcO " core show an octahedral six-coordinated or a square pyramidal five-coordinated spatial configuration complexes containing a TcOj core form octahedral six-coordinated complexes. In the presence of suitable ligands, other cores and complexes of lower oxidation states (IV, III, I) may be achieved (Jones and Davison 1982). 

Keywords Product variety Mass customisation Product configuration Complexity management Variability management Formal variability analysis... 

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