structural isomers


Also found in: Medical.

structural isomers

[′strək·chə·rəl ′ī·sə·mərz]
(organic chemistry)
References in periodicals archive ?
Aromatic biomarkers and their structural isomers have been found useful for the maturity assessment of oils, source rocks and coals (Radke et al, 1982a; Radke and Welte, 1983; Alexander et al, 1985; Radke et al., 1986; Garrigues et al, 1988; Strachan et al, 1988; Akaegbobi et al, 2000; Akinlua et al, 2007; Sonibare et al, 2008).
First, the vitamin B3 was found along with its structural isomers -- related molecules that have the same chemical formula but whose atoms are attached in a different order.
Structural isomers of poly/fluorinated di-and tri-alkylated phosphate ester surfactants present in industrial blends and in microwave popcorn bags.
Dionex's reversed-phase HPLC column, the Acclaim C30, is suited for a range of separations including hydro phobic, long chain, structural isomers (carotenoids, steroids and pharmaceuticals), lipids (phospholipids, omega fatty acids and cooking oils) and hydrophilic analytes (water-soluble vitamins and organic acids).
Although problems had been previously solved that are now recognised as corresponding to applications of graph theory, Cayley in 1875 attempted to enumerate structural isomers of chemical compounds on the basis of this theory before Sylvester defined the name in 1878 [1].
As expected the two structural isomers having an atomic sequence HONO are more stable than the other possible tetra atomic combinations such as HOON or OONH that are far more unstable than the isomer having a central nitrogen atom.
This value is much larger than the band gaps of its structural isomers PFDA and PPV.
Separation of the chloroform extract by column chromatography over silica gel allowed to isolate four mixtures of these triterpenes, each of them constituted of two structural isomers 1-2, 3-4, 5-6, and 7-8, in the ratio ursane:oleanane derivatives 2:1.

Full browser ?