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The synthesis of oligonucleotides from dimers to a hexamer by a H‐phosphonate approach in solution using solid‐supported acyl chloride is reported herein. This strategy avoids the use of chromatography. The work‐ups have been simplified and involve filtration, aqueous extraction and precipitation. The synthesis was scaled up to 1 mmol for the dimers and 340 μmol for the hexamer. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

A new production of hydrothermal synthetic emeralds, grown in the Czech Republic with Italian technology, has been marketed since December 2004 with the trade name Malossi synthetic emerald. Several samples were investigated by standard gemological methods, combined with chemical analyses and UV-Vis-NIR and IR spectroscopy. A comparison of this material with natural and other synthetic emeralds (the latter grown by the flux and hydrothermal techniques) reveals that Malossi hydrothermal synthetic emerald can be identified on the basis of microscopic features and chemical composition, along with the mid-infrared spectrum.