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The [NH 3]/[H 2] ratio has been estimated to range from 10 −7 in small dark clouds [176] up to 10 −5 in the dense core of the Orion molecular cloud complex. [177] Although a total of 18 total production routes have been proposed, [178] the principal formation mechanism for interstellar NH 3 is the reaction: [NH 4] + + e − → NH 3 + H
A Lewis base, then, is any species that has a filled orbital containing an electron pair which is not involved in bonding but may form a dative bond with a Lewis acid to form a Lewis adduct. For example, NH 3 is a Lewis base, because it can donate its lone pair of electrons.
Reaction of diborane with ammonia mainly gives the diammoniate salt [H 2 B(NH 3) 2] + [BH 4] − (diammoniodihydroboronium tetrahydroborate). Ammonia borane is the main product when an adduct of borane is employed in place of diborane: [5] BH 3 + NH 3 → BH 3 NH 3 + THF. It can also be synthesized from sodium borohydride. [6] [7] [8]
Molecular structure Point group: C 3v: Bond length: 101.2 pm (N–H) [1] Bond angle: ... %wt NH 3: Partial Pressure NH 3: Partial Pressure H 2 O Heat capacity of ...
Hexaamminecobalt(III) chloride is the chemical compound with the formula [Co(NH 3) 6]Cl 3.It is the chloride salt of the coordination complex [Co(NH 3) 6] 3+, which is considered an archetypal "Werner complex", named after the pioneer of coordination chemistry, Alfred Werner.
[1] [2] [3] Introduced by Gilbert N. Lewis in his 1916 article The Atom and the Molecule, a Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. [4] Lewis structures extend the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.
Trimethylamine (TMA) is an organic compound with the formula N(CH 3) 3. It is a trimethylated derivative of ammonia. TMA is widely used in industry. [5] [6] At higher concentrations it has an ammonia-like odor, and can cause necrosis of mucous membranes on contact. [7] At lower concentrations, it has a "fishy" odor, the odor associated with ...
Structural representations used by Alfred Werner (right) and Sophus Mads Jørgensen for one isomer of the dichloride salt of the complex [Pt(NH 3) 2 (pyridine) 2] 2+. [3]Ammine complexes played a major role in the development of coordination chemistry, specifically determination of the stereochemistry and structure.