Eight-membered rings

HMX, also called octogen, is a powerful and relatively insensitive nitroamine high explosive chemically related to RDX. The compound's name is the subject of much speculation, having been variously listed as High Melting Explosive, High-velocity Military Explosive, or High-Molecular-weight RDX, as well as '''Her Majesty's Explosive'''.

Cyclooctane is a cycloalkane with the molecular formula (CH2)8. It is a simple colourless hydrocarbon, but it is often a reference compound for saturated eight-membered ring compounds in general.

Metaldehyde is an organic compound with the formula (). It is used as a pesticide against slugs and snails. It is the cyclic tetramer of acetaldehyde.

1,3,5,7-Cyclooctatetraene (COT) is an unsaturated derivative of cyclooctane. It is a colorless flammable liquid at room temperature. COT is an antiaromatic compound as it possesses 8 π electrons. In contrast to the aromaticity commonly seen in benzene rings; antiaromaticity destabilises the COT molecule. This destabilisation effect is so strong that COT avoids it by adopting a non-planar 'tub' conformation, which prevents all of the π orbitals from forming a single conjugated system. As a result, COT possesses significant polyene character and will undergo many reactions that benzene rings wil

1,5-Cyclooctadiene (also known as cycloocta-1,5-diene) is a cyclic hydrocarbon (a cycloalkene) with the chemical formula , specifically .

chemical compound

thumb|Possible isomers of cyclooctene.Cyclooctene is the cycloalkene with a formula . Its molecule has a ring of 8 carbon atoms, connected by seven single bonds and one double bond.

chemical compound

Octasulfur is an inorganic substance with the chemical formula . It is an odourless and tasteless yellow solid, and is a major industrial chemical. It is the most common allotrope of sulfur and occurs widely in nature.

thumb|right|140px|Cycloocta-1,5-diene A cyclooctadiene (often abbreviated COD) is any of several cyclic diene with the formula C₈H₁₂. Focusing only on cis derivatives, four isomers are possible: 1,2-, which is an allene, 1,3-, 1,4-, and 1,5-. Commonly encountered isomers are the conjugated isomer cycloocta-1,3-diene and cycloocta-1,5-diene, which is used as a ligand for transition metals. These dienes are colorless volatile liquids.

chemical compound

'2-C-Methyl--erythritol-2,4-cyclopyrophosphate (MEcPP') (also 2-C-Methyl--erythritol-2,4-cyclodiphosphate) is an intermediate in the MEP pathway (non-mevalonate) of isoprenoid precursor biosynthesis. MEcPP is produced by MEcPP synthase (IspF) and is a substrate for HMB-PP synthase (IspG).

Cyclooctanone is an organic compound with the formula . It is a waxy white solid.

chemical compound

Cyclooctyne is the cycloalkyne with a formula . Its molecule has a ring of 8 carbon atoms, connected by seven single bonds and one triple bond.

chemical compound