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Contents.General Chemical structures and reaction schemes should conform to the following:. Images should be drawn with a, never freehand. settings should be used for both structures and reaction schemes. These settings are all available as templates in the ChemDraw, Isis/Draw and ChemSketch. Please use sans-serif fonts like Arial. Indexes used for labelling must be superscripted: R 1-CH 2-R 2 (not R 1-CH 2-R 2). Do not include English text in images: this prevents their reuse in other languages.
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Methyl groups should be denoted with “CH 3”, not “Me”, unless they are bound to a heteroatom (for example, “NMe 2”). This is to avoid confusion with “Me”, the German abbreviation for metal ( Metall). The use of “Et”, “Pr”, etc., is discouraged. By default, “Ph” denotes phenyl and “X” halogen.
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The use of explicit methyl groups in the following cases is a stylistic choice, and both forms are generally acceptable on Wikipedia:. methyl groups attached to a ring or as branches in a longer carbon chain;. methyl groups at the end of a carbon chain. If labels for structures are desired, consider the use of bolded numerals, which are language-neutral. Information about and should be included if available (e.g. By using wedged bonds). For articles on racemates, the stereochemistry should be depicted as undefined (straight and not wavy nor wedged bonds attached to the stereogenic center).Technical considerations.
Images should be uploaded in or format. PNG images should be around 600–720 dpi.
A transparent background should be used. Images should still be readable when scaled down to 450 pixels to prevent conflicts with the Chembox. SVG images are desirable because they are infinitely scalable, while remaining compact. However, support for SVG images among common molecule editors is limited, and may not be rendered correctly on Wikipedia.
Scanned images tend to be of poor quality. Scanned images of books or journals may violate copyright. BKchem prefs.xml.