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The Seven Bridges of Königsberg is a historically notable problem in mathematics. Its negative resolution by Leonhard Euler, in 1736, [1] laid the foundations of graph theory and prefigured the idea of topology. [2] The city of Königsberg in Prussia (now Kaliningrad, Russia) was set on both sides of the Pregel River, and included two large ...
Besides bicyclo, the prefix should also specify the positions of all methyl substituents so the complete, official name becomes 1,7,7-trimethylbicyclo[2.2.1]heptan-2-one. When naming simple fused bicyclic compounds, the same method as for bridged bicyclic compounds is applied, except the third path between the two bridgehead atoms now consists ...
Steve Young (July 12, 1942 – March 17, 2016) [1] was an American country music singer, songwriter and guitarist, known for his song "Seven Bridges Road" (on Rock Salt & Nails & Seven Bridges Road). He was a pioneer of the country rock, Americana, and alternative country sounds, and he was also a vital force behind the outlaw movement.
Many simple organic ligands form strong bridges between metal centers. Many common examples include organic derivatives of the above inorganic ligands (R = alkyl, aryl): OR −, SR −, NR − 2, NR 2− (imido), PR − 2 (phosphido, note the ambiguity with the preceding entry), PR 2− (phosphinidino), and many more.
Seven Bridges may refer to: Seven Bridges, Reading, a street named after a series of bridges over streams of the River Kennet; Seven Bridges of Königsberg, a notable historical problem in mathematics; Seven Bridges Road, a 1972 album by country rock musician Steve Young "Seven Bridges Road", the album's title track, covered by The Eagles and ...
In organic chemistry, an anti-Bredt molecule is a bridged molecule with a double bond at the bridgehead. Bredt's rule is the empirical observation that such molecules only form in large ring systems. For example, two of the following norbornene isomers violate Bredt's rule, and are too unstable to prepare: Bridgehead atoms violating Bredt's ...
Seven Bridges Road is an ode to Woodley Road (County Road 39, Montgomery County, Alabama), a rural two-lane road which runs south off East Fairview Avenue — the southern boundary of the Cloverdale neighborhood of Montgomery, Alabama — at Cloverdale Road, and which features seven bridges: three pairs of bridges, and the seventh approximately one mile south by itself.
In organic chemistry, a cyclophane is a hydrocarbon consisting of an aromatic unit (typically a benzene ring) and a chain that forms a bridge between two non-adjacent positions of the aromatic ring. More complex derivatives with multiple aromatic units and bridges forming cagelike structures are also known.