Aluminum complexes ammines

The hydroxo complex ions formed in this way have instability constants, just as ammine or other complexes do. These instability constants are somewhat special, in that one of the products of the equilibrium is the insoluble amphoteric hydroxide. Thus, for aluminum hydroxide,... 

Aluminum hydroxy species, 65,69,160 Stability constants, 69 Stability diagrams, 78 pH of minimum solubility, 65, 71, 72 Ammonium, 326, 331 Volatilization, 330 Oxidation, 334-336,472 Nitrate, 334-336,472 Adsorption, 336,465-466 Metal-ammine complexes, 460—461, 465... 

In view of what precedes, it has been the aim of the present work to identify the Ru-species present in faujasite-type zeolites activated under WGS-conditions, making use of the avail-albe literature data. The activation procedure of Ru(III)hex-ammine in NaY has been related to its catalytic performance as low temperature WGS-catalvst. Subsequently, the basicity of the material was related to its catalytic behavior in the same reaction, by changing the nature of the parent complex, of the charge compensating cations and of the aluminum content of the faujasite-type zeolite. 

The only problem remaining in formulating say, ethylene platinous chloride (VI), was how the olefin attached itself to the transition metal atom. There were reports of ill-defined zinc- and aluminum-olefin complexes, and most chemists, if they thought of them at all, believed that olefin compounds, though much less stable and less numerous than the ammines, occurred just as widely. 

This hypothesis has been confirmed [28] by Pt and Cu ammine adsorption experiments conducted with ZSM5, mordenite, and Y-54 zeohtes with the aluminum contents indicated in Figure 3.6b, anticipating the hybrid uptake curve of Figure 3.6a in the case of overexchange. Results for the Pt and Cu ammine complexes were similar, which supports the notion of the last section... 

Asare [50-52] studied the adsorption of Cu(H), Ni(II), and Co(II) onto titania, hematite, alumina, and quartz in ammoniacal solutions and found that the conventional sigmoidal adsorption curve was replaced by an adsorption profile that increased initially with increased pH, declined in adsorption as the ammine complexes formed, and then increased at high pH as the hydroxide ligands replaced the ammonia ligands. This effect was also reported by Luo and Huang [53], who studied Cu(H) adsorption onto iron(III), aluminum(Hl), and tin(IV) oxides in ammonia solution for the pH range 5-9. 

Aluminum, coordination compounds, 446 Aminopolycarboxylates, lanthanide, complexation, 346-358 Ammine cupric ions, complexity constant determination, 101-106 Ammine cuprous ions, complexity constant determination, 106-107 Ammonium ion-hydrogen-bonding receptor complexes, schematic representation, 150,151/... 

A technique for the preparation of aluminum nitride and gallium nitride filnns has been developed based upon the decomposition of ammine complexes.51 The nitrides were prepared through thermal decomposition of Aia3-NH3 and GaCl3-NH3 or Gal3-NH3, for example, Eq. 12.20 ... 

---