Electric Literature of 33100-27-5, 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.33100-27-5, Name is 1,4,7,10,13-Pentaoxacyclopentadecane, molecular formula is C10H20O5. In a patent, introducing its new discovery.
Self-diffusion coefficient D, viscosity eta and density rho of nearly spherical molecules (tetraalkyl-, tetraalkoxy compounds) and of nearly disk-like molecules (crown ethers) were measured (250 less than equivalent to T/K less than equivalent to 370). minus **1J-NMR spin-echo spectroscopy was applied for the measurements of D. eta was determined via a Ubbelohde microviscometer and rho via a vibrating densimeter. D and rho follow the Stokes-Einstein-Gierer-Wirtz relation. The free-volume theory of M. H. Cohen and D. Turnbull (CT) was applied to describe the experimental data quantitatively. By introducing geometrical relations for the mean free path lambda and the critical free volume v//f* the CT-model was extended and applied to the experimental results.
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