page_title: Tetrahedrane
section_title: Inorganic and organometallic tetrahedranes
hierarchical_section_title: Tetrahedrane / Inorganic and organometallic tetrahedranes
caption_attribution_description: English: chemical structures sometimes called tetrahedranes
context_page_description: Tetrahedrane is a hypothetical platonic hydrocarbon with chemical formula C₄H₄ and a tetrahedral structure. The molecule would be subject to considerable angle strain and has not been synthesized as of 2019. However, a number of derivatives have been prepared. In a more general sense, the term tetrahedranes is used to describe a class of molecules and ions with related structure, e.g. white phosphorus.
context_section_description: The tetrahedrane motif occurs broadly in chemistry.  White phosphorus (P₄) and yellow arsenic (As₄) are examples. Several metal carbonyl clusters are referred to as tetrahedranes, e.g. tetrarhodium dodecacarbonyl. Metallatetrahedranes with a single metal (or phosphorus atom) capping a cyclopropyl trianion also exist.
caption: Metal clusters that have tetrahedral cores are often called tetrahedranes.
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