H-beta zeolites differing in removal of the template by calcination in an oxygen or in a stream of ammonia, and in their subsequent steam treatment at various temperatures, as well as beta zeolites exchanged with alkaline metal ions, were investigated in the MPV reduction of 4- tert-butyl cyc...
Lewis basesPhosphanylalumanesLewis acid–base complexestype="main"> Phosphanylalumanes bearing hydrogen and halogen substituents (RHP–AlXR, R = organic substituent, X = halogen) are expected to be useful synthetic precursors for P=Al doubly bonded species, phosphaalumenes (RP=AlR), though ...
Synthesis and Structure of Lewis Base‐Coordinated Phosphanylalumanes Bearing P–H and Al–Br MoietiesAluminumPhosphorusLewisbasesPhosphanylalumanesLewisacid–basecomplexesPhosphanylalumanes bearing hydrogen and halogen substituents (RHP–AlXR, R = organic substituent, X = halogen) are expected to be ...
摘要: Porous γ-Al2O3 generally possesses a nm-scale local structure.The tetragonal average structure contains a substantial fraction of "non-spinel" Al atoms.The concentration of "non-spinel" Al atoms correlates with surface properties.关键词:...
Reactions of Sb(SiMe3)3 with different aluminum trialkyls, R3Al (R = Me, Et, t-Bu), and diorganoaluminum chlorides, R2AlCl (R = Me, Et, t-Bu), in a 1:1 molar ratio are described. Aluminum trialkyls form simple Lewis acid−base adducts, R3Al←Sb(SiMe3)3 (R = Me (1),...
Addition of Lewis bases results in monomerization and coordination to the unique formal Al+ atom, giving [(L)xAl(AlCp*)3]+ salts where L is hexaphenylcarbodiphosphorane (x = 1), tetramethylethylenediamine (x = 1) or 4-dimethylaminopyridine (x = 3). The Al+–AlCp* ...
Using data from 56 mature forest plots across Amazonia, we consider the relative roles of species composition (wood specific gravity) and forest structure (basal area) in determining variation in AGB. Mean stand-level wood specific gravity, on a per stem basis, is 15.8% higher in forests in ...
The Lewis acid-base adducts of bismuth and aluminium trihalides — crystal structures of [Bi2X4][AlX4]2 (X = Cl, Br) The reactions of BiCl3 with AlCl3 and of BiBr3 with AlBr3 yield [Bi2Cl4][AlCl4]2 1 and [Bi2Br4][AlBr4]2 2 in almost quantitative yield. The reactions were ...
Alström Syndrome is defined as an autosomal recessive disease characterized by deafness, obesity, diabetes, cardiomyopathy, and RP. It shares similarities with Bardet–Biedl syndrome and is associated with the ALMS1 gene, which is believed to be crucial for cilium structure and function. ...
Indicating an ambiphilic reactivity, crystallographic as well as UV/VIS spectrometric and computational studies reveal the dimeric structure [Al2(AlCp*)6]2+([pf]–)2 of 1 in the solid state as well as in solution at high concentration and low-temperature. Addition of Lewis bases to ...