Term which determines total number of rings and π bonds
For other uses, see Degree of saturation.
In the analysis of the molecular formula of organic molecules, the degree of unsaturation (DU) (also known as the index of hydrogen deficiency (IHD), double bond equivalents (DBE), or unsaturation index[1]) is a calculation that determines the total number of rings and π bonds. A formula is used in organic chemistry to help draw chemical structures. It does not give any information about those components individually—the specific number of rings, or of double bonds (one π bond each), or of triple bonds (two π bonds each). The final structure is verified with use of NMR, mass spectrometry and IR spectroscopy, as well as qualitative inspection. It is based on comparing the actual molecular formula to what would be a possible formula if the structure were saturated—having no rings and containing only σ bonds—with all atoms having their standard valence.
^Sparkman, David O. (2006). Mass Spectrometry Desk Reference. Pittsburgh: Global View Pub. p. 54. ISBN 0-9660813-9-0.
and 28 Related for: Degree of unsaturation information
In the analysis of the molecular formula of organic molecules, the degreeofunsaturation (DU) (also known as the index of hydrogen deficiency (IHD), double...
transparency Degreeofunsaturation, in organic chemistry, also known as the index of hydrogen deficiency or rings plus double bonds dGH, degreesof general...
unsaturated compounds, a classification of compounds related to their ability to resist addition reactions Degreeofunsaturation Saturated fat or saturated fatty...
a system of naming conventions used to describe the type and location ofunsaturation within organic compounds. The "degreeofunsaturation" is a formula...
e., fewer calories) than an equivalent amount of saturated fat. The greater the degreeofunsaturation in a fatty acid (i.e., the more double bonds in...
mass of iodine in grams that is consumed by 100 grams of a chemical substance. Iodine numbers are often used to determine the degreeofunsaturation in...
a high degreeofunsaturation are most susceptible to autoxidation. The best test for autoxidation (oxidative rancidity) is determination of the peroxide...
likelihood and severity of allergic reaction to urushiol is dependent on the degreeofunsaturationof the hydrocarbon chain. Less than half of the general population...
the degreeofunsaturation is u = ( n − r + 2 ) 2 {\displaystyle u={\frac {\left(n-r+2\right)}{2}}\,} A negative value of u indicates the presence of heteroatoms...
phenolic compounds, whereas high temperature reduces oil content and degreeofunsaturation, and raises protein content. S. hispanica is described and pictured...
used to test the saturation of hydrocarbons. The bromine test can also be used as an indication of the degreeofunsaturation for unsaturated hydrocarbons...
compound because the composition of the side chain varies in its degreeofunsaturation. Tri-unsaturated cardanol, the major component (41%) is shown below...
would crack. Linoleum in essence consists of two components, a polymerizable organic compound and a collection of fillers, pigments, catalysts. The polymerizable...
so unreactive toward addition reactions, given its presumed high degreeofunsaturation. The cyclohexatriene structure for benzene was first proposed by...
temperature reduces oil content and degreeofunsaturation, and raises protein content.[citation needed] The cultivation of S. hispanica requires light to...
proportionally. This means that the relative degreeofunsaturationof alkenones can be used to estimate the temperature of the water in which the alkenone-producing...
analytical method. The iodine number and bromine number are measures of the degreeofunsaturation for fats and other organic compounds. Aromatic compounds are...
contain different carbon numbers, different degreesofunsaturation, and different configurations and positions of olefins. Vegetable oils and animal fats...
the strain of the molecule would have to be considered. The strain of five-membered rings increased with a decrease degreeofunsaturation. This was a...
amount of hydrogen (and, thus, single bonds) in the fatty acid. This subsequent lesser degreeofunsaturation (and, simultaneously, greater degreeof saturation)...
The bromine number indicates the degreeofunsaturationof a sample. The technique can be subject to a variety of problems, whereby the sample consumes...
the degreeofunsaturation. The term originates from elaidic acid, the trans-isomer of oleic acid. Elaidinization of oleic acid, a common component of vegetable...
polymerize) by the action of oxygen (not through the evaporation of water or other solvents). Drying oils are a key component of oil paint and some varnishes...
pathway for aromatization. The activation barrier decreases with the degreeofunsaturation. Thus, cyclohexadienes are especially prone to aromatization. Formally...
unsaturated, with the configuration of the double bonds nearly always "cis". The length and the degreeofunsaturationof fatty acid chains have a profound...
configuration of the double bonds nearly always cis. The length and the degreeofunsaturationof FAs chains have a profound effect on membranes' fluidity. Plant...
(arsenic sulfide), have fallen from use. Many pigments are toxic to some degree. Commonly used reds and yellows are produced using cadmium, and vermilion...
Global Information