--- title: "Newman projections: butane Template | MolDraw" url: https://www.moldraw.com/templates/stereo-newman-butane/ description: "Newman projections: butane template: Butane viewed down C2–C3: anti (180°), gauche (60°), eclipsed (120°) and syn (0°) Newman projections and the energy…" lang: en publisher: Scidart Academy generated: 2026-10-28 --- [MolDraw](https://www.moldraw.com/) › [Templates](https://www.moldraw.com/templates/) › [Stereochemistry](https://www.moldraw.com/templates/stereochemistry/) › Newman projections: butane [Stereochemistry](https://www.moldraw.com/templates/stereochemistry/)Free # Newman projections: butane template ![Newman projections: butane template: Butane viewed down C2–C3: anti (180°), gauche (60°), eclipsed (120°) and syn (0°) Newman projections and the energy against dihedral angle (anti 0, gauche 3.8, eclipsed 16, syn 19 kJ mol⁻¹).](https://www.moldraw.com/templates/download/stereo-newman-butane.svg) [Edit in MolDraw](https://www.moldraw.com/)[Download SVG](https://www.moldraw.com/templates/download/stereo-newman-butane.svg) Free template. Download it, or open it in MolDraw to change it first. Butane viewed down C2–C3: anti (180°), gauche (60°), eclipsed (120°) and syn (0°) Newman projections and the energy against dihedral angle (anti 0, gauche 3.8, eclipsed 16, syn 19 kJ mol⁻¹). ## What the template shows - Rotation about C2–C3: anti, gauche, eclipsed and syn, and the torsional energy curve - Conformations of butane (C2–C3) - butane: view down the C2–C3 bond - CH₃–C2–C3–CH₃ dihedral angle - Energy / kJ mol⁻¹ - Anti (CH₃ groups 180° apart) is the most stable conformation; the two gauche forms (60°) are about 3.8 kJ mol⁻¹ higher (steric strain between the CH₃ groups). - Eclipsed forms are maxima: CH₃/H eclipsed about 16 kJ mol⁻¹, syn (CH₃/CH₃ eclipsed, 0°) about 19 kJ mol⁻¹. - At 25 °C butane is roughly 70 % anti and 30 % gauche; the two gauche forms are mirror images. - The same gauche interaction is the 1,3-diaxial strain in cyclohexane chairs. - Wedge = toward you, hash = away from you · every part of this figure is editable Drawn with 4 atoms, 565 shapes – every one editable in MolDraw. ## Sources - [Clayden, Greeves & Warren, Organic Chemistry, 2nd ed., OUP 2012, ch. 16](https://openlibrary.org/isbn/9780199270293) Textbook - [Eliel & Wilen, Stereochemistry of Organic Compounds, Wiley 1994, ch. 10](https://openlibrary.org/isbn/9780471016700) Textbook ## How to use this template 1. Press **Edit in MolDraw**. The template opens on the canvas of the free MolDraw editor. 2. Change anything: move structures, edit atoms and labels, recolour highlights or delete what you do not need. 3. Add your own structures, arrows and text next to it, or combine several templates on one page. 4. Export the drawing as PNG, SVG or PDF for slides, worksheets, theses and papers. ## Frequently asked questions ### Is the Newman projections: butane template free? Yes. The Newman projections: butane template is one of the free MolDraw templates: open it in the editor or download it from this page as SVG or PNG and use it in your slides, worksheets and notes. ### Can I edit the Newman projections: butane template? Yes. It opens as an ordinary MolDraw drawing, so every structure, arrow, label and colour can be changed, and you can add your own content around it. ### Is the chemistry checked? Every structure is checked with RDKit and every curly arrow passes MolDraw’s electron-flow audit. The sources used are listed on this page. ### Are the R/S labels in the stereochemistry templates checked? Yes. 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