Having an extended tetrahedral configuration, as in diamond, or adamantane.

(chemistry) Any compound having two triflate groups

(chemistry) The monatomic ion C⁴⁻, or any of its salts.

(chemistry) Any compound containing two carbonate groups per molecule

(chemistry) Any cation, of general formula X²⁺, formed by the removal of two electrons from a neutral species

(inorganic chemistry) A diatomic molecule of a halogen

(inorganic chemistry) The explosive binary compound of oxygen and fluorine O₂F₂

(chemistry, in combination) A chemical compound containing twelve carbonate ions. (CO₃)₁₂.

(inorganic chemistry) Any oxide having twelve oxygen atoms.

(inorganic chemistry, in combination) A chemical compound with twelve silicate groups in the formula.

(chemistry) An atom, radical or element having a combining power of seven.

(chemistry, in combination) A chemical compound with seven oxygen atoms with double bonds.

(chemistry) A compound having six simple phosphate groups

(chemistry) Any compound containing six nitrate groups.

(chemistry) Any cation formed by addition of a hydron (proton) to a solvent molecule

(chemistry, transitive) To introduce a single bromine atom into (a compound)

A single tetrazolium group in a compound

(chemistry, in combination) Nine hydroxy ions or groups in a molecule ((OH)₉)

(chemistry) any cation derived by the addition of a proton to the hydride of any element of the nitrogen, chalcogen or halogen families

Alternative form of pentoxide [(inorganic chemistry) any oxide containing five oxygen atoms in each molecule]

(chemistry) A compound having five phosphate groups

In NMR spectroscopy, a group of five peaks whose intensity is in the ratio 1:4:6:4:1. Note, that "pentet" is a non-standard notation; it should be replaced by "quintet" (compare "quartet" and "triplet" are also based on Latin numbering).

(inorganic chemistry) any oxide containing five oxygen atoms in each molecule

(chemistry) A molecule or ion containing three or more chlorine atoms

(chemistry, in combination) Many fluorine atoms in a molecule.

(chemistry) A structural formula which is reduced (i.e., skeletal) in the sense that carbon atoms forming the backbone of the structure (esp. of an organic compound) are not labeled — they are shown simply as vertices — and hydrogen atoms are not shown at all (except those which are bonded to heteroatoms, or the exceptionally labeled carbon atoms) but heteroatoms are always labeled. (Labels of labeled hydrogen atoms are written next to labels of the atoms that they are bonded to, without a bond drawn between them. If there are several labeled hydrogen atoms bonded to the same atom then they are written as an H with a subscript for their number.) Carbon atoms which are (optionally) labeled tend to be in reactive extremities of the molecule, not the backbone of it.

sodium acetate that has three molecules of water of crystallization

(chemistry, of an acid) containing four replaceable hydrogen atoms

(chemistry) Any borate having four boron atoms.

Any compound that contains four butoxide groups

(inorganic chemistry, in combination) Four carbon atoms in a compound

(inorganic chemistry) Any compound having four carbonyl groups.

(chemistry) Any cation, of general formula X⁴⁺, formed by the removal of four electrons from a neutral species

(organic chemistry) Any compound containing four ether functional groups

(chemistry) Four ethyl groups in a molecule.

(chemistry) Any halide having four halogen atoms

(inorganic chemistry) Any hydride containing four atoms of hydrogen per molecule

(chemistry, especially in combination) Any compound containing four hydrochloride groups

(inorganic chemistry, particularly in combination) A chemical compound containing four hydroxyl groups.

(organic chemistry) Any compound containing four ketide groups

(chemistry) Any compound containing four simple phosphate groups

(organic chemistry, in combination) Four linoleoyl groups in a compound

(inorganic chemistry, in combination) Four lithium ions in a compound

(organic chemistry) (in combination) Four methyl groups in a molecule.

(inorganic chemistry) Any compound containing four nitrate groups

(chemistry) any nitride containing four nitrogen atoms in each molecule

Alternative spelling of tetroxide [(chemistry) any oxide containing four oxygen atoms in each molecule]

(chemistry, in combination) A chemical compound with four oxygen atoms with double bonds.

(chemistry) an allotrope of oxygen having four atoms in each molecule instead of the normal two; only stable under very high pressures

(organic chemistry) The univalent anion B(C₆H₅)₄⁻ containing four phenyl groups attached to a boron atom; any salt containing this anion

(organic chemistry) Any compound that contains four phthalate groups

(inorganic chemistry) Any compound containing four silicate anions.

(inorganic chemistry) A tennesside containing four atoms of tennessine

Any compound containing four thiolate groups

(chemistry) Any thiophosphate in which four oxygen atoms have been replaced by sulfur

(chemistry) Any of a certain series of basic compounds containing a chain of four nitrogen atoms.

(chemistry) any oxide containing four oxygen atoms in each molecule

(chemistry) any bromide containing three bromine atoms in each molecule

(organic chemistry) The linear oxocarbon having three carbon atoms

(inorganic chemistry) Any compound that contains three chalcogenide ions

(inorganic chemistry) Any hydride containing three atoms of hydrogen per molecule

(inorganic chemistry) ozone (the triatomic allotrope of oxygen)

(chemistry) Any compound containing three perchlorate groups

A cation derived from triphenylphosphine

(chemistry) Any compound containing three thiocyanate groups

(inorganic chemistry) A chemical compound, XeO₄

(inorganic chemistry) The oxygenated cation of zirconium ZrO²⁺