Ammonia Solvent
Ammonia Solvent - Related Videos
08:14
Ammonia Synthesis at Low Pressure
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Cited by 17 •
2017
Ammonia can be synthesized at low pressure by using a conventional catalyst and an ammonia selective absorbent.
01:12
Solvents
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2019
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute. A...
06:27
Fast and Accurate Exhaled Breath Ammonia Measurement
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Cited by 16 •
2014
Ammonia is an important physiologic metabolite relevant to various disease and wellness states. It is also a difficult molecule to measure in breath, which demands particular precautions be taken to obtain accurate results. Not all factors influencing ammonia are known, but progress can be difficult without accounting for these factors.
06:43
Rotary Evaporation to Remove Solvent
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2023
Source: Dr. Melanie Pribisko Yen and Grace Tang — California Institute of Technology Rotary evaporation is a technique most commonly used in organic chemistry to remove a solvent from a higher-boiling point compound of interest. The rotary evaporator, or "rotovap", was invented in 1950 by the chemist Lyman C. Craig. The primary use of a rotovap is to dry and purify samples for downstream applications. Its speed and ability to handle large volumes of solvent make rotary evaporation a preferred...
09:41
Schlenk Lines Transfer of Solvents
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2023
Source: Hsin-Chun Chiu and Tyler J. Morin, laboratory of Dr. Ian Tonks—University of Minnesota Twin Cities Schlenk lines and high vacuum lines are both used to exclude moisture and oxygen from reactions by running reactions under a slight overpressure of inert gas (usually N2 or Ar) or under vacuum. Vacuum transfer has been developed as a method separate solvents (other volatile reagents) from drying agents (or other nonvolatile agents) and dispense them to reaction or storage vessels while...
FAQs
Limited self-ionization gives the medium its own acid–base framework: ammonia can generate ammonium ions and amide ions. Those species allow proton-transfer chemistry to be interpreted relative to the solvent itself, rather than assuming water-based behavior. This matters when researchers examine strong bases, because amide ions and related solvent effects can influence which transformations remain feasible.
Alkali metals dissolved in liquid ammonia can produce solvated electrons, meaning electrons stabilized by interactions with the surrounding solvent. This creates a distinctive redox environment separate from ordinary proton-transfer chemistry. The system therefore provides a way to study electron-transfer processes in which ammonia helps sustain a chemically active electronic species and exposes its effects on the reaction.
Ammonia changes the chemical setting in ways water may not. Its acid–base behavior, coordination properties, and ability to stabilize solvated electrons can support strong-base, metal–ammonia, or electron-transfer chemistry. Consequently, using ammonia is not simply a solvent substitution; it can make transformations accessible that water would suppress and can reveal nonaqueous reaction behavior.
Suitability depends on the reaction’s dominant requirement. If the goal is to investigate strong bases, metal–ammonia complexes, or electron transfer, ammonia offers solvent properties matched to those processes. Researchers can therefore select it when water would interfere with or suppress the transformation. The expected outcome is a nonaqueous environment that highlights relevant acid–base, redox, or coordination behavior.
Experiments in this medium can distinguish whether a transformation is governed primarily by proton transfer, electron transfer, or coordination with ammonia. Observing reactions involving ammonium and amide ions, solvated electrons, or metal–ammonia complexes helps connect the outcome to a specific solvent-mediated mechanism. This makes ammonia solvent systems useful for studying how nonaqueous conditions alter inorganic and organic chemistry.
Ammonia does more than provide a liquid reaction medium: it can participate in coordination behavior with metals, producing metal–ammonia complexes. These complexes give researchers a way to examine how a solvent influences metal-containing systems, alongside its acid–base and redox effects. That combination is especially relevant to inorganic chemistry and to reactions where metal coordination affects the transformation.