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In 1978, Günther Maier prepared tetra-tert-butyl-tetrahedrane. [1]The bulky tert-butyl (t-Bu) substituents envelop the tetrahedrane core.Maier suggested that bonds in the core are prevented from breaking because this would force the substituents closer together (corset effect) resulting in Van der Waals strain.
In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron.The bond angles are arccos(− 1 / 3 ) = 109.4712206...° ≈ 109.5° when all four substituents are the same, as in methane (CH 4) [1] [2] as well as its heavier analogues.
The coordination geometry of an atom is the geometrical pattern defined by the atoms around the central atom. The term is commonly applied in the field of inorganic chemistry, where diverse structures are observed.
English: This shows the materials science tetrahedron, which illustrates how a material's properties, processing, performance, and structure are interrelated. It is based on its having prior use in my engineering studies as a teaching device and symbol of the discipline, using this file as a reference.
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If two regular tetrahedra are given the same orientation on the 3-fold axis, a different compound is made, with D 3h, [3,2] symmetry, order 12. Other orientations can be chosen as 2 tetrahedra within the compound of five tetrahedra and compound of ten tetrahedra the latter of which can be seen as a hexagrammic pyramid:
The compound of five tetrahedra represents two chiral halves of this compound (it can therefore be seen as a "compound of two compounds of five tetrahedra"). It can be made from the compound of five cubes by replacing each cube with a stella octangula on the cube's vertices (which results in a "compound of five compounds of two tetrahedra").
Download as PDF; Printable version; In other projects Wikidata item; Appearance. move to sidebar hide. A compound of tetrahedra might be: Compound of two tetrahedra ...