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2. Stereoisomerism - Wikipedia

   en.wikipedia.org/wiki/Stereoisomerism

   Stereochemistry focuses on stereoisomers, red boxes in the picture. In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space. [1][2] This contrasts with ...

3. Stereochemistry - Wikipedia

   en.wikipedia.org/wiki/Stereochemistry

   Stereochemistry focuses on stereoisomers. Stereochemistry, a subdiscipline of chemistry, studies the spatial arrangement of atoms that form the structure of molecules and their manipulation. [1] The study of stereochemistry focuses on the relationships between stereoisomers, which by definition have the same molecular formula and sequence of ...

4. Atropisomer - Wikipedia

   en.wikipedia.org/wiki/Atropisomer

   The atropisomer is an iodoaryl compound synthesised starting from (S)- valine and exists as the (M,S) isomer and the (P,S) isomer. The interconversion barrier between the two is 24.3 kcal / mol (101.7 kJ /mol). The (M,S) isomer can be obtained exclusively from this mixture by recrystallisation from hexanes.

5. Conformational isomerism - Wikipedia

   en.wikipedia.org/wiki/Conformational_isomerism

   Conformational isomerism. Rotation about single bond of butane to interconvert one conformation to another. The gauche conformation on the right is a conformer, while the eclipsed conformation on the left is a transition state between conformers. Above: Newman projection; below: depiction of spatial orientation.

6. List of PDF software - Wikipedia

   en.wikipedia.org/wiki/List_of_PDF_software

   deskUNPDF: PDF converter to convert PDFs to Word (.doc, docx), Excel (.xls), (.csv), (.txt), more; GSview: File:Convert menu item converts any sequence of PDF pages to a sequence of images in many formats from bit to tiffpack with resolutions from 72 to 204 × 98 (open source software) Google Chrome: convert HTML to PDF using Print > Save as PDF.

7. PDFtk - Wikipedia

   en.wikipedia.org/wiki/Pdftk

   PDFtk. PDFtk (short for PDF Toolkit) is a toolkit for manipulating Portable Document Format (PDF) documents. [3][4] It runs on Linux, Windows and macOS. [5] It comes in three versions: PDFtk Server (open-source command-line tool), PDFtk Free (freeware) and PDFtk Pro (proprietary paid). [2] It is able to concatenate, shuffle, split and rotate ...