Search results
Results From The WOW.Com Content Network
Liquid properties Std enthalpy change of formation, Δ f H o liquid –196.4 kJ/mol Standard molar entropy, S o liquid: 117.3 J/(mol K) Enthalpy of combustion, Δ c H o –1167 kJ/mol Heat capacity, c p: 96.21 J/(mol K) at 0 °C 89.05 J/(mol K) at 25 °C Gas properties Std enthalpy change of formation, Δ f H o gas –170.7 kJ/mol Standard ...
Acetaldehyde is an important precursor to pyridine derivatives, pentaerythritol, and crotonaldehyde. Urea and acetaldehyde combine to give a useful resin. Acetic anhydride reacts with acetaldehyde to give ethylidene diacetate, a precursor to vinyl acetate, which is used to produce polyvinyl acetate. [24] The global market for acetaldehyde is ...
Aldehydes have properties that are diverse and that depend on the remainder of the molecule. Smaller aldehydes such as formaldehyde and acetaldehyde are soluble in water, and the volatile aldehydes have pungent odors. Aldehydes can be identified by spectroscopic methods. Using IR spectroscopy, they display a strong ν CO band near 1700 cm −1.
At room temperature, acetaldehyde (H 3 CC(O)H) is more stable than vinyl alcohol (H 2 C=CHOH) by 42.7 kJ/mol. [3] Vinyl alcohol gas isomerizes to the aldehyde with a half-life of 30 min at room temperature. [1] H 2 C=CHOH → H 3 CC(O)H The industrial synthesis of acetaldehyde (Wacker process) proceeds via the intermediacy of a vinyl alcohol ...
This page contains tables of azeotrope data for various binary and ternary mixtures of solvents. The data include the composition of a mixture by weight (in binary azeotropes, when only one fraction is given, it is the fraction of the second component), the boiling point (b.p.) of a component, the boiling point of a mixture, and the specific gravity of the mixture.
A number of bacteria living on acetylene have been identified. The enzyme acetylene hydratase catalyzes the hydration of acetylene to give acetaldehyde: [49] C 2 H 2 + H 2 O → CH 3 CHO. Acetylene is a moderately common chemical in the universe, often associated with the atmospheres of gas giants. [50]
AOL Mail welcomes Verizon customers to our safe and delightful email experience!
The conversion of acetoin into acetyl-CoA is catalysed by the acetoin dehydrogenase complex, following a mechanism largely analogous to the pyruvate dehydrogenase complex; however, as acetoin is not a 2-oxoacid, it does not undergo decarboxylation by the E1 enzyme; instead, a molecule of acetaldehyde is released. [3]