Melting points were determined with a Büchi Melting Point B-540 apparatus. 1H NMR and 13C NMR spectra were recorded on Brucker ARX 250, Brucker DRX 300 or Brucker DRX 500 spectrometers by using CDCl3, if not otherwise indicated. Chemical shifts (δ) are expressed in ppm relative to TMS. Multiplicity is indicated as s (singlet), d (doublet), t (triplet) and m (multiplet). Har stands for an aromatic proton in 1H NMR. CIV indicates a quaternary carbon in the 13C NMR assignation. J values are given in Hz. 19F NMR was performed using 1,2-difluorobenzene as external standard (δ= −139.0 ppm). Electron Impact (EI) mass spectra were recorded at 70 eV on Jeol JMS-700 and Finnigan TSQ 700 spectrometers at the Institut für Organische Chemie der Ruprecht-Karls Universität Heidelberg. Elemental analyses were carried out in the Mikroanalytisches Laboratorium der Chemischen Fakultät der Ruprecht-Karls Universität Heidelberg. Analytical thin layer chromatography (TLC) was performed on pre-coated silica gel plates Polygram® SIL G/UV254 and silica gel G60 from Macherey-Nagel (230–400 mesh) was used for flash column chromatography.
Drx 300
Manufactured by Brucker
The DRX 300 is a laboratory instrument designed for performing X-ray diffraction analysis. It is capable of identifying and characterizing crystalline materials.
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2 protocols using drx 300
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Characterization of Organic Compounds
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Characterization of Organic Compounds
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Melting points (m.p.) were determined using an Electrothermal 9100 instrument (UK) with open capillaries. Compound purity was verified through a recrystallization method. Infrared (IR) spectra were acquired with a Shimadzu IR Affinity-1 spectrophotometer, employing potassium bromide (KBr) as the medium. 1H-NMR and 13C-NMR spectra were recorded on a Brucker DRX-300 (400 MHz) instrument, using tetramethylsilane (TMS) as the internal standard and chloroform (CHCl3) as the solvent. Chemical shifts (δ) are reported in parts per million (ppm). Absorption spectra were collected using a Shimadzu UV-visible double-beam spectrophotometer (model UV1800, Japan) with a fixed 1 nm bandwidth, and a 1 cm quartz cell was used for spectrophotometric measurements.
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