A relatively new class of three-dimensional ordered mesoporous silicates, KIT-6, incorporated with Earth-abundant metals such as Zr, Nb, and W (termed as M-KIT-6), show remarkable tunability of acidity and metal dispersion depending on the metal content, type, and synthetic method. The metal-incorporation is carried out using one-pot synthesis procedures that are amenable to easy scale-up. By s...

We present photofragment imaging experiments to characterize potential photolytic precursors of three C4H7 radical isomers: 1-methylallyl, cyclopropylmethyl, and 3-buten-1-yl radicals. The experiments use 2+1 resonance enhanced multiphoton ionization (REMPI) with velocity map imaging to state-selectively detect the Br(2P(3/2)) and Br(2P(1/2)) atoms as a function of their recoil velocity imparte...

In the title compound {systematic name: 1-(2-hy-droxy-eth-yl)-4-[3-(2-trifluoro-methyl-10H-phenothia-zin-10-yl)prop-yl]piperazine-1,4-diium dichloride dimethanol disolvate}, C(22)H(28)F(3)N(3)OS(2+)·2Cl(-)·2CH(3)OH, the dihedral angle between the planes of the two outer benzene rings of the tricyclic phenothia-zine system is 46.91 (13)°. The piperazine ring adopts a chair conformation. The crys...

The structure of a complex, arapen, formed between Pt ethylenediamine dichloride (PtenCl 2) and 1-(fl-Darabinofuranosyl)cytosine (ara-C) is described. The sugar puckering is C(2')-endo, and an intramolecular hydrogen bond connecting 0(2') to 0(5') in the sugar moiety is observed, a feature seen in the structure of neutral ara-C. The possible implications of the structure to reactivity studies o...

(E)-2-(1-Cyano-2-methoxy-2-oxoethylidene)-3,4-dioxo-1-(pyridin-1-ium-1-yl)cyclobutan-1-ide was obtained by a three-component reaction of squaric acid dichloride with pyridine and methyl cyanoacetate.

One of the most important objectives in chemistry is to understand and control the selectivity towards a desired reaction pathway. In catalysis, selectivity is thought to be governed by the catalyst’s structure; many practical catalysts, however, have an inherently complex structure that obstructs their detailed understanding; therefore, simplified materials are studied instead. In order to adv...