What might you expect to observe (at 298 K) in the 19 F NMR spectra of solutions
Question:
What might you expect to observe (at 298 K) in the 19F NMR spectra of solutions containing
(a) [PF6]−
(b) [SbF6]−.
Data needed are in Table 15.2.
Table 15.2.
Transcribed Image Text:
Property Atomic number, Z Ground state electronic configuration Enthalpy of atomization, A.H°(298 K)/ kJ mol Melting point, mp/K Boiling point, bp/K Standard enthalpy of fusion, AfusH(mp)/kJ mol-¹ First ionization energy, IE, /kJ mol-¹ Second ionization energy, IE₂ / kJ mol¹ Third ionization energy, IE/kJ mol-¹ Fourth ionization energy, IE/kJ mol-¹ Fifth ionization energy, IE, /kJ mol Metallic radius, metal/pm Covalent radius, rov/pm* 7 [He]2s²2p³ 4731 63 77 0.71 1402 2856 4578 7475 9445 P 15 [Ne]3s²3p³ 315 317 550 0.66 1012 1907 2914 4964 6274 75 Ionic radius, Fion/ pm* 171 (N³) NMR active nuclei (% abundance, nuclear spin) 14N (99.6,1=1) 3¹P (100, 1 =) 15N (0.4, 1=3) 110 As 33 [Ar]3d¹04s²4p³ 302 887 sublimes 24.44 947.0 1798 2735 4837 6043 122 Sb 51 [Kr]4d¹05s²5p³ 264 904 2023 19.87 830.6 1595 2440 4260 5400 143 As (100,1) 121 Sb (57.3,1 =) 123 Sb (42.7,1 =) Bi 83 [Xe]4f1*5c!06s?6p® 210 544 1837 11.30 703.3 1610 2466 4370 5400 182 152 103 (Bi³+) 209 Bi (100, =)
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