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The tetrafluoroammonium cation (also known as perfluoroammonium) is a positively charged polyatomic ion with chemical formula NF + 4. It is equivalent to the ammonium ion where the hydrogen atoms surrounding the central nitrogen atom have been replaced by fluorine. [1] Tetrafluoroammonium ion is isoelectronic with tetrafluoromethane CF 4 ...
In contrast, an ammonium ion consists of one nitrogen atom and four hydrogen atoms, with a charge of +1; its chemical formula is N H + 4. Polyatomic ions often are useful in the context of acid–base chemistry and in the formation of salts. Often, a polyatomic ion can be considered as the conjugate acid or base of a neutral molecule.
In chemistry, the pentazenium cation (also known as pentanitrogen) is a positively-charged polyatomic ion with the chemical formula N + 5 and structure N−N−N−N−N.Together with solid nitrogen polymers and the azide anion, it is one of only three poly-nitrogen species obtained in bulk quantities.
Structure of the Bi 2+ 8 cluster in [Bi 8](GaCl 4) 2.The Bi–Bi bond lengths are 3.07 Å. [1]Bismuth polycations are polyatomic ions of the formula Bi n+ x.They were originally observed in solutions of bismuth metal in molten bismuth chloride. [2]
Quaternary ammonium cation. The R groups may be the same or different alkyl or aryl groups. Also, the R groups may be connected. In organic chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure [NR 4] +, where R is an alkyl group, an aryl group [1] or organyl group.
Li 9 Ge 4 Li 22 Sn 5. Li 2 Sn 5. Li 3 P LiP Li 3 P 7 LiP 4 LiP 5 LiP 7 LiP 15. Li 3 As LiAs Li 3 Sb Li 3 Bi LiBi Li 2 S Li 2 Se Li 2 Te LiCl LiBr LiI Na NaGa 4. NaIn Na 2 Tl (the polyanion is tetrahedral (Tl 4) 8-Concept Tl 2-~ P) NaTl (See Figure) NaSi (the polyanion is tetrahedral (Si 4) 4-Concept Si − ~ P) Na x Si 136 (x ≤ 11) Na 8 Si ...
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The triangular Hg 4+ 3 cation was confirmed in a reinvestigation of the mineral terlinguaite in 1989 [4] and subsequently synthesised in a number of compounds. [11] The bonding has been described in terms of a three-center two-electron bond where overlap of the 6s orbitals on the mercury atoms gives (in D 3h symmetry) a bonding "a 1" orbital. [12]