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Fe0.74Sn5 nanospheres are synthesized from a mixture of Sn nanospheres (obtained by reduction of SnCl2 with NaBH4 in tetraethylene glycol at 170 °C) and FeCl3 in tetraethylene glycol (205 °C, 2 h).

Two new polymorphs, β- and γ-In2Ge6O15(NH2CH2CH2NH2)2, have been synthesized under solvothermal conditions using 2-methylpentamethylenediamine as a solvent and structurally characterized by single-...

Intramolecular [4+4] photocycloaddition of 2-pyridones tethered by a three-carbon chain yield mixtures of trans and cis products. A general method is described for producing the trans isomer from the cis isomer by Cope rearrangement of the latter followed by photolysis. Photocleavage of the Cope product transiently reforms the tethered pyridones which then undergo a new [4+4] photocycloaddition. The trans isomer is inert to the reaction conditions and so the transformations can be performed without isolation steps. Two cycles of heating and irradiation transform an initial trans/cis ratio of 2:1 to nearly 20:1, with a corresponding increase in the yield of the trans isomer. Combination of this chemistry with control from a tether substituent allows for the facile synthesis of a single [4+4] product with five stereogenic centers

Black lamellar crystals of the title compound, which contains three unique uranium sites for U4+, U5+, and U5+/U6+ ions, are hydrothermally prepared from an aqueous mixture of UO3, SiO2, NaOH, and CsF in the molar ratio Na/Cs/U/Si = 10:5:0.5:6 (autoclave, 170 MPa, 600 °C, 2 d, 23% yield).

The conversion of (3-hydroxy-1-propen-1-yl)boronates to substituted enamides and enol benzoates is readily achieved in a one-pot procedure consisting of a regiocontrolled Mitsunobu reaction with convenient nucleophiles, followed by allylboration of aldehydes. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

A new uranium(V) silicate, K3(U3O6)(Si2O7), and the germanate analogue, Rb3(U3O6)(Ge2O7), have been synthesized under high-temperature, high-pressure hydrothermal conditions and characterized by single-crystal X-ray diffraction. Their structures contain uranate columns formed of triple octahedral chains of the alpha-UF5 type linked by disilicate (or digermanate) units to form a 3-D framework structure. The valence state of uranium is confirmed by X-ray photoelectron spectroscopy, X-ray absorption spectroscopy, and magnetic susceptibility.