Tetraborate
In chemistry, tetraborate or pyroborate is an anion (negative ion) with formula B4O2−7; or a salt containing that anion, such as sodium tetraborate, Na2B4O7. It is one of the boron oxoacids, that is,
Cyclopentadienyl anion
In chemistry, the cyclopentadienyl anion or cyclopentadienide is an aromatic species with a formula of [C5H5]− and abbreviated as Cp−. It is formed from the deprotonation of the molecule cyclopentadie
Tetranitratoaluminate
Tetranitratoaluminate is an anion of aluminium and nitrate groups with formula [Al(NO3)4]− that can form salts called tetranitratoaluminates. It is unusual in being a nitrate complex of a light elemen
Antimonide
Antimonides (sometimes called stibnides) are compounds of antimony with more electropositive elements. The antimonide ion is Sb3−. Reduction of antimony by alkali metals or by other methods leads to a
Hydrogen anion
The hydrogen anion, H−, is a negative ion of hydrogen, that is, a hydrogen atom that has captured an extra electron. The hydrogen anion is an important constituent of the atmosphere of stars, such as
Lyate ion
In chemistry, a lyate ion is the anion derived by the deprotonation of a solvent molecule. For example, a hydroxide ion is formed by the deprotonation of water, and methoxide (CH3O−) is the anion form
Nitronate
A nitronate (IUPAC: azinate) in organic chemistry is a functional group with the general structure R1R2C=NO−2. It is the anion of nitronic acid (sometimes also called an aci, or an azinic acid), a tau
Ferricyanide
Ferricyanide is the anion [Fe(CN)6]3−. It is also called hexacyanoferrate(III) and in rare, but systematic nomenclature, hexacyanidoferrate(III). The most common salt of this anion is potassium ferric
Hexachloroplatinate
Hexachloroplatinate is an anion with the chemical formula [PtCl6]2−. Chemical compounds containing the hexachloroplatinate anion include:
* Chloroplatinic acid (or dihydrogen hexachloroplatinate), H2
Iodide
An iodide ion is the ion I−. Compounds with iodine in formal oxidation state −1 are called iodides. In everyday life, iodide is most commonly encountered as a component of iodized salt, which many gov
Tetranitratoborate
Tetranitratoborate is an anion composed of boron with four nitrate groups. It has formula [B(NO3)4]−. It can form salts with large cations such as tetramethylammonium nitratoborate, or tetraethylammon
Borohydride
Borohydride refers to the anion [BH4]−, which is also called tetrahydroborate, and its salts. Borohydride or hydroborate is also the term used for compounds containing [BH4-nXn]−, where n is an intege
Cyanide
Cyanide is a naturally occurring, rapidly acting, toxic chemical that can exist in many different forms. In chemistry, a cyanide (from Greek kyanos 'dark blue') is a chemical compound that contains a
Thiocyanate
Thiocyanate (also known as rhodanide) is the anion [SCN]−. It is the conjugate base of thiocyanic acid. Common derivatives include the colourless salts potassium thiocyanate and sodium thiocyanate. Me
Tetraperchloratoaluminate
Tetraperchloratoaluminates are salts of the tetraperchloratoaluminate anion, [Al(ClO4)4]−. The anion contains aluminium tetrahedrally surrounded by four perchlorate groups. The perchlorate is covalent
Arsinide
An arsinide, arsanide, dihydridoarsenate(1−) or arsanyl compound is a chemical derivative of arsine, where one hydrogen atom is replaced with a metal or cation. The arsinide ion has formula AsH−2. It
Carboxylate
In organic chemistry, a carboxylate is the conjugate base of a carboxylic acid, RCOO− (or RCO−2). It is an ion with negative charge. Carboxylate salts are salts that have the general formula M(RCOO)n,
Bismuthide
The bismuthide ion is Bi3−. Bismuthides are compounds of bismuth with more electropositive elements. They are intermetallic compounds, containing partially metallic and partially ionic bonds. The majo
Bicarbonate
In inorganic chemistry, bicarbonate (IUPAC-recommended nomenclature: hydrogencarbonate) is an intermediate form in the deprotonation of carbonic acid. It is a polyatomic anion with the chemical formul
Pentanitratoaluminate
Pentanitratoaluminate is an anion of aluminium and nitrate groups with formula [Al(NO3)5]2− that can form salts called pentanitratoaluminates. It is unusual being a complex with five nitrate groups, a
Trimethylenetetrathiafulvalenedithiolate
Trimethylenetetrathiafulvalenedithiolate (tmdt) is a ligand used in the making of metal organic electric conductors. It normally has a charge of −2. Known compounds include Ni(tmdt)2, Pt(tmdt)2, Pd(tm
Chloride
The chloride ion /ˈklɔːraɪd/ is the anion (negatively charged ion) Cl−. It is formed when the element chlorine (a halogen) gains an electron or when a compound such as hydrogen chloride is dissolved i
Monofluorophosphate
Monofluorophosphate is an anion with the formula PO3F2−, which is a phosphate group with one oxygen atom substituted with a fluoride atom. The charge of the ion is −2. The ion resembles sulfate in siz
Lewis acidic antimony compounds
Among pnictogen group Lewis acidic compounds, unusual lewis acidity of Lewis acidic antimony compounds have long been exploited as both stable conjugate acids of non-coordinating anions (SbF−6 and Sb2
Plumbide
A plumbide can refer to one of two things: an intermetallic compound that contains lead, or a Zintl phase compound with lead as the anion.
Carbide
In chemistry, a carbide usually describes a compound composed of carbon and a metal. In metallurgy, carbiding or carburizing is the process for producing carbide coatings on a metal piece.
Hexafluoroplatinate
A hexafluoroplatinate is a chemical compound which contains the hexafluoroplatinate PtF−6 anion. It is produced by combining substances with platinum hexafluoride.
Phosphide
In chemistry, a phosphide is a compound containing the P3− ion or its equivalent. Many different phosphides are known, with widely differing structures. Most commonly encountered on the binary phosphi
TRISPHAT
TRISPHAT (full name tris(tetrachlorocatecholato)phosphate(1−)) is an inorganic anion with the formula P(O2C6Cl4)−3 often prepared as the tributylammonium ((C4H9)3NH+) or tetrabutylammonium ((C4H9)4N+
Bisulfide
Bisulfide (or bisulphide in British English) is an inorganic anion with the chemical formula HS− (also written as SH−). It contributes no color to bisulfide salts, and its salts may have a distinctive
Germyl
Germyl, trihydridogermanate(1-), trihydrogermanide, trihydridogermyl or according to IUPAC Red Book: germanide is an anion containing germanium bounded with three hydrogens, with formula GeH−3. Germyl
Nonaflate
Nonaflate, CF3CF2CF2CF2SO−3, is the common name given to nonafluorobutanesulfonates, the salts or esters of perfluorobutanesulfonic acid. Its uses are similar to those of triflate.It is a good leaving
Superoxide
In chemistry, a superoxide is a compound that contains the superoxide ion, which has the chemical formula O−2. The systematic name of the anion is dioxide(1−). The reactive oxygen ion superoxide is pa
Keggin structure
Keggin structure is the best known structural form for heteropoly acids. It is the structural form of α-Keggin anions, which have a general formula of [XM12O40]n−, where X is the heteroatom (most comm
Arsenide
In chemistry, an arsenide is a compound of arsenic with a less electronegative element or elements. Many metals form binary compounds containing arsenic, and these are called arsenides. They exist wit
Perchloratoborate
Perchloratoborate is an anion of the form [B(ClO4)4]−. It can form partly stable solid salts with heavy alkali metals. They are more stable than nitratoborate salts. K[B(ClO4)4] decomposes at 35 °C, R
Hypothiocyanite
Hypothiocyanite is the anion [OSCN]− and the conjugate base of hypothiocyanous acid (HOSCN). It is an organic compound part of the thiocyanates as it contains the functional group SCN. It is formed wh
Dodecaborate
The dodecaborate(12) anion, [B12H12]2−, is a borane with an icosahedral arrangement of 12 boron atoms, with each boron atom being attached to a hydrogen atom. Its symmetry is classified by the molecul
Silanide
A silanide is a chemical compound containing an anionic silicon(IV) centre, the parent ion being SiH−3. The hydrogen atoms can also be substituted to produced more complex derivative anions such as tr
Silicide
A silicide is a type of chemical compound that combines silicon and a (usually) more electropositive element. Silicon is more electropositive than carbon. Silicides are structurally closer to borides
Oxide
An oxide (/ˈɒksaɪd/) is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula. "Oxide" itself is the dianion of oxygen, an O2– (molecular) ion. with
Tetraphenylborate
Tetraphenylborate (IUPAC name: Tetraphenylboranuide) is an organoboron anion consisting of a central boron atom with four phenyl groups. Salts of tetraphenylborate uncouple oxidative phosphorylation.
Bromide
A bromide ion is the negatively charged form (Br−) of the element bromine, a member of the halogens group on the periodic table. Most bromides are colorless. Bromides have many practical roles, being
Pentadienyl
In organic chemistry, pentadienyl refers to the organic radical, anion, or cation with the formula [CH2(CH)3CH2]z, where z = 0, −1, +1, respectively.
Nitridoborate
The nitridoborates are chemical compounds of boron and nitrogen with metals. These compounds are typically produced at high temperature by reacting hexagonal boron nitride (α -BN) with metal nitrides
Tetrahydroxozincate
In chemistry, tetrahydroxozincate or tetrahydroxidozincate is a divalent anion (negative ion) with formula Zn(OH)2−4, with a central zinc atom in the +2 or (II) valence state coordinated to four hydro
Organotrifluoroborate
Organotrifluoroborates are organoboron compounds that contain an anion with the general formula [RBF3]−. They can be thought of as protected boronic acids, or as adducts of carbanions and boron triflu
Ferrioxalate
Ferrioxalate or trisoxalatoferrate(III) is a trivalent anion with formula [Fe(C2O4)3]3−. It is a transition metal complex consisting of an iron atom in the +3 oxidation state and three bidentate oxala
Nitrile anion
Nitrile anions is jargon from the organic product resulting from the deprotonation of alkylnitriles. The proton(s) α to the nitrile group are sufficiently acidic that they undergo deprotonation by str
Tetrakis(3,5-bis(trifluoromethyl)phenyl)borate
Tetrakis[3,5-bis(trifluoromethyl)phenyl]borate is an anion with chemical formula [{3,5-(CF3)2C6H3}4B]−, which is commonly abbreviated as [BArF4]−, indicating the presence of fluorinated aryl (ArF) gro
Ferrocyanide
Ferrocyanide is the name of the anion [Fe(CN)6]4−. Salts of this coordination complex give yellow solutions. It is usually available as the salt potassium ferrocyanide, which has the formula K4Fe(CN)6
Polysulfide
Polysulfides are a class of chemical compounds containing chains of sulfur atoms. There are two main classes of polysulfides: inorganic and organic. Among the inorganic polysulfides, there are ones wh
Triflate
In organic chemistry, triflate (systematic name: trifluoromethanesulfonate), is a functional group with the formula R−OSO2CF3 and structure R−O−S(=O)2−CF3. The triflate group is often represented by −
Nitride
In chemistry, a nitride is a compound of nitrogen where nitrogen has a formal oxidation state of −3. Nitrides are a large class of compounds with a wide range of properties and applications. The nitri
Stannide
A stannide can refer to an intermetallic compound containing tin combined with one or more other metals; an anion consisting solely of tin atoms or a compound containing such an anion, or, in the fiel
Carbanion
In organic chemistry, a carbanion is an anion in which carbon is trivalent (forms three bonds) and bears a formal negative charge (in at least one significant resonance form). Formally, a carbanion is
Tetrafluoroberyllate
Tetrafluoroberyllate or orthofluoroberyllate BeF2−4 is an anion containing beryllium and fluorine. The fluoroanion has a tetrahedral shape, with the four fluorine atoms surrounding a central beryllium
Pyrophosphate
In chemistry, pyrophosphates are phosphorus oxyanions that contain two phosphorus atoms in a P–O–P linkage. A number of pyrophosphate salts exist, such as disodium pyrophosphate (Na2H2P2O7) and tetras
Cyaphide
Cyaphide, P≡C−, is the phosphorus analogue of cyanide. It is not known as a discrete salt, however In silico measurements reveal that the −1 charge in this ion is located mainly on carbon (0.65), as o
Hydride
In chemistry, a hydride is formally the anion of hydrogen( H−). The term is applied loosely. At one extreme, all compounds containing covalently bound H atoms are called hydrides: water (H2O) is a hyd
Ketone enolate
A ketone enolate is an enolate formed from a ketone by reaction with a strong base, such as lithium diisopropylamide, or with a Lewis acid such as dibutylboron trifluoromethanesulfonate and a weak bas
Polyiodide
The polyiodides are a class of polyhalogen anions composed entirely of iodine atoms. The most common and simplest member is the triiodide ion, I−3. Other known larger polyiodides include [I4]2−, [I5]−
Imidazolate
Imidazolate (C3H3N−2) is the conjugate base of imidazole. It is a nucleophile and a strong base. The free anion has C2v symmetry. Imidazole has a pKa of 14.05, so the deprotonation of imidazole (C3H3N
Fluoride
Fluoride (/ˈflʊəraɪd, ˈflɔːr-/) is an inorganic, monatomic anion of fluorine, with the chemical formula F− (also written [F]−), whose salts are typically white or colorless. Fluoride salts typically h
Bifluoride
The bifluoride ion is an inorganic anion with the chemical formula [HF2]−. The anion is colorless. Salts of bifluoride are commonly encountered in the reactions of fluoride salts with hydrofluoric aci
Phosphaethynolate
The phosphaethynolate anion, also referred to as PCO, is the phosphorus-containing analogue of the cyanate anion with the chemical formula [PCO]− or [OCP]−. The anion has a linear geometry and is comm
Difluorophosphate
Difluorophosphate or difluorodioxophosphate or phosphorodifluoridate is an anion with formula PO2F−2. It has a single negative charge and resembles perchlorate (ClO−4) and monofluorosulfonate (SO3F−)
Azanide
Azanide is the IUPAC-sanctioned name for the anion NH−2. The term is obscure; derivatives of NH−2 are almost invariably referred to as amides, despite the fact that amide also refers to the organic fu
Alkalide
An alkalide is a chemical compound in which alkali metal atoms are anions (negative ions) with a charge or oxidation state of −1. Until the first discovery of alkalides in the 1970s, alkali metals wer
Dihydrogen phosphate
Dihydrogen phosphate or dihydrogenphosphate ion is an with the formula [H2PO4]−. Phosphates occur widely in natural systems. These sodium phosphates are artificially used in food processing and packag
Ferrate
Ferrate loosely refers to a material that can be viewed as containing anionic iron complexes. Examples include tetrachloroferrate ([FeCl4]2−), oxyanions (FeO2−4), tetracarbonylferrate ([Fe(CO)4]2−), t
Dicyanamide
Dicyanamide, also known as dicyanamine, is an anion having the formula C2N−3. It contains two cyanide groups bound to a central nitrogen anion. The chemical is formed by decomposition of 2-cyanoguanid
Fluoroanion
In chemistry, a fluoroanion or fluorometallate anion is a polyatomic anion that contains one or more fluorine atoms. The ions and salts form from them are also known as complex fluorides. They can occ
Nitronickelate
The nitronickelates are a class of chemical compounds containing a nickel atom complexed by nitro groups, -NO2.Nickel can be in a +2 or +3 oxidation state. There can be five (pentanitronickelates), or
Triiodide
In chemistry, triiodide usually refers to the triiodide ion, I−3. This anion, one of the polyhalogen ions, is composed of three iodine atoms. It is formed by combining aqueous solutions of iodide salt
Telluride (chemistry)
The telluride ion is the anion Te2− and its derivatives. It is analogous to the other chalcogenide anions, the lighter O2−, S2−, and Se2−, and the heavier Po2−. In principle, Te2− is formed by the two
Cyclooctatetraenide anion
In chemistry, the cyclooctatetraenide anion or cyclooctatetraenide, more precisely cyclooctatetraenediide, is an aromatic species with a formula of [C8H8]2− and abbreviated as COT2−. It is the dianion
Hexanitratoaluminate
Hexanitratoaluminate is an anion of aluminium and six nitrate groups with formula [Al(NO3)6]3− that can form salts called hexanitratoaluminates.
Metallate
Metallate or metalate is the name given to any complex anion containing a metal ligated to several atoms or small groups. Look up metallate in Wiktionary, the free dictionary. Typically, the metal wil
Sulfide
Sulfide (British English also sulphide) is an inorganic anion of sulfur with the chemical formula S2− or a compound containing one or more S2− ions. Solutions of sulfide salts are corrosive. Sulfide a
Diethynylbenzene dianion
In organic chemistry, a diethynylbenzene dianion is an anion consisting of two ethynyl anions as substituents on a benzene ring. With the chemical formula C6H4C2−4, three positional isomers are possib
Thiophosphate
Thiophosphates (or phosphorothioates, PS) are chemical compounds and anions with the general chemical formula PS4−xO3−x (x = 0, 1, 2, or 3) and related derivatives where organic groups are attached to
Acetylide
In organometallic chemistry, acetylide refers to chemical compounds with the chemical formulas MC≡CH and MC≡CM, where M is a metal. The term is used loosely and can refer to substituted acetylides hav
Metal peroxide
Metal peroxides are metal-containing compounds with ionically- or covalently-bonded peroxide (O2−2) groups. This large family of compounds can be divided into ionic and covalent peroxide. The first cl
Cuprate
Cuprate loosely refers to a material that can be viewed as containing anionic copper complexes. Examples include tetrachloridocuprate ([CuCl4]2−), the superconductor YBa2Cu3O7, and the organocuprates
Tetrahydroxyborate
Tetrahydroxyborate is an inorganic anion with the chemical formula [BH4O4]− or [B(OH)4]−. It contributes no colour to tetrahydroxyborate salts. It is found in the mineral hexahydroborite, Ca(B(OH)4)2
Hexaperchloratoaluminate
The hexaperchloratoaluminate ion is a triple negative complex of perchlorate with aluminium. It is related to hexanitratoaluminate and tetraperchloratoaluminate all of which are highly oxidising energ