Edge displacement

An examination of the photolysis of trans-[Cr(NH3)4(H20)(NCS)Hg], produced from trtms-[Cr(NH3)4(H20)(NCS)f (1) by interaction with Mg, and of (1) itself, has shown that only cis-[Cr(NH3)4(H20)2] is formed. Emission activation energies have been determined for [Cr(NH3)5CN] and trans-[Cr(NH3)4(CN)2p and ligand field irradiation of cis-[Cr(NH3)4(CN)2] in acid solution leads to aquation of NH3 and CN in a process whose quantum yields are wavelength dependent. The product [Cr(NH3)3(H20)(CN)2] consists of a mixture of l,2-CN-3-H20 and l,2-CN-6-H20, the composition of which is determined by the ligand-field band excited. A E state is thought to be involved, and either a dissociative (symmetry restricted) or associative (edge displacement) mechanism operates. ... 

VanQuickenbome and Ceulemans have advanced a model, based on the angular overlap model variant of ligand field theory, to rationalize the observations of the preferentially labilized ligand [68], This model was focussed mainly on T2 as the reactive state. Although not a necessary feature of their treatment, they concluded that a dissociative mechanism was operative. Kirk suggested an edge displacement mechanism, which is associative [5], but he also considered a dissociative mechanism [12], An associative mechanism for the prompt T2 reaction has been inferred on the basis of symmetry arguments [6]. 

Figure 19. Cutting edge displacement on turning hardened steel with advanced ceramic tools (a) at V = 220 mmin (above), (b) at 300mmin (below) see Table 4 for materials characterization.

At all cutting velocities the new laboratory grades are clearly superior to advanced commercial inserts. Contrary to a sometimes different behavior of flank wear and cutting edge displacement on turning hard cast iron, both parameters were well... 

The stereochemistry of the products usually follows the edge displacement rule, which is shown in Figure 17.23. The nucleophile enters the coordination... 

Proposed reaction coordinate diagram for the photoaquation of [Cr(NH3)5CI] explaining the observed stereochemistry using the edge displacement rule. 

Example 17-6. The photoaquation of c/s-[Cr(NH3)4Cl2] leads exclusively to the mer-[Cr(NH3)3(H20)CI]+ product. Using the edge displacement rule, construct a reaction coordinate diagram similar to the one in Figure 17.25 to explain the observed stereoselectivity. 

Figure 8 Dynamic loading and unloading of a zonal rotor. (A) Gradient loaded with rotor spinning at 2000 rpm, (B) sample injected at 2000 rpm, followed by injection of overlay, (C) particles separated with rotor at speed, and (D) contents unloaded by introducing dense solution at rotor edge, displacing fractions at center. (Courtesy of Beckman Coulter, Inc.)...

Acar B, Beaulieu CF, Gokturk SB et al (2002) Edge displacement field-based classification for improved detection of polyps in CT coionography. IEEE Trans Med Imaging 21 1461-1467... 

The support width will be Nj, = 23.6 in. Add 3 in required temperature movement, the total required support width equals to 26.5 in. The required minimum support width for seismic case equals to the sum of bridge seismic displacement, bridge temperature displacement, and the reserved edge displacement (usually 4 in). In this example, this requirement equals to 14 in, not in control. Based on the 26.5 in minimum requirement, the design uses 30 in, OK. A preliminary abutment configuration is shown in Figure 6.14 based on the given information and calculated support width. 

The simplest type of interface is the interface between the particles of same catalysts. If the crystals are tilted with one another, certain incompatible spaces can be produced on boundary. This is equivalent to the introduction of the edge displacement between the crystals. The quantity and boundary energy of the latter is increased with the increase of angle of inclination of crystal. If the crystals cause rotation among each other, a network of screw displacement will appear. The combination of tilt and rotation will form a complex system of spiral and edge displacement. 

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