Electric Literature of 14098-44-3, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.14098-44-3, Name is Benzo-15-crown-5, molecular formula is C14H20O5. In a patent, introducing its new discovery.
13C NMR spectra of cis-cyclohexyl-15-crown-5-ether in the temperature range 298-173 K have been recorded.A single degenerate conformational process, attributed to cyclohexyl ring inversion, has been detected with a barrier of ca 10.3 kcal mol-1.Sodium ion complexation increases this barrier by ca 0.5 kcal mol-1, whereas potassium ion complexation has no measurable effect.Spin-lattice relaxation time results also indicates more effective complexation of sodium ion than potassium ion by the macrocyclic crown ether system. – KEY WORDS cys-Cyclohexyl-15-crown-5-ether Dynamic stereochemistry 13C NMR Sodium or potassium ion complexation Relaxation times
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