Physical Chemistry and Its Biological ApplicationsPhysical Chemistry and Its Biological Applications ... |
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Page 509
... shifts . Thus an A2BXY2 system has two A nuclei , one B nucleus with a shift close to that of the A nuclei , and one X and two Y nuclei with chemical shifts far removed from A and B but close W a 2 Figure 13-12 Calculated AB spectra for ...
... shifts . Thus an A2BXY2 system has two A nuclei , one B nucleus with a shift close to that of the A nuclei , and one X and two Y nuclei with chemical shifts far removed from A and B but close W a 2 Figure 13-12 Calculated AB spectra for ...
Page 521
... shift for some fluoroorganic structural units . -CFH2 HF Si F4 C6F6 -CF- -CF2H BF3 C - CF2 - C C6H5F C = CF2 -CF2 - N CF3 - C CF2-0 CF4 -CF2Br CF , CI CFCI 3 -C ( = O ) F -NF2 SF 6 100 50 1 -50 -100 Chemical shift ( ppm ) -150 -200 -250 ...
... shift for some fluoroorganic structural units . -CFH2 HF Si F4 C6F6 -CF- -CF2H BF3 C - CF2 - C C6H5F C = CF2 -CF2 - N CF3 - C CF2-0 CF4 -CF2Br CF , CI CFCI 3 -C ( = O ) F -NF2 SF 6 100 50 1 -50 -100 Chemical shift ( ppm ) -150 -200 -250 ...
Page 522
... shifts . The variation in shift with structure is much like that of 1H , with aliphatic carbons at high field and olefinic and aromatic carbons at low field . Figure 13-24 shows a typical spectrum in which coupling to the hydrogens has ...
... shifts . The variation in shift with structure is much like that of 1H , with aliphatic carbons at high field and olefinic and aromatic carbons at low field . Figure 13-24 shows a typical spectrum in which coupling to the hydrogens has ...
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absorption acid adsorbed adsorption amino amount behavior benzene Calculate carbon carboxyl cell chain charge Chem chemical chemical shift chloride cm³ coefficient complex components concentration containing corresponding curve described diagram dipole dissociation distance effect electric electrolyte electron energy change enthalpy entropy enzyme equal equation equilibrium constant example force free energy frequency function H₂O heat hydrogen atom hydrogen bonds increase interaction ionic ionization k₁ k₂ kcal kcal/mol kinetic magnetic field magnitude material measured membrane mixture molar mole fraction molecular weight molecules nuclei occurs orbital osmotic pressure oxidation oxygen particles polar potential protein proton quantum number radiation rate constant ratio reactant reaction represented resonance rotation sample shown in Figure sodium solid solubility solvent species spectrum spin structure substance sucrose surface tension temperature tion titration torr transition triplet tube vapor pressure velocity vibrational viscosity volume wavelength zero