Chemical Thermodynamics of Tin - Volume 12 - OECD Nuclear ...

404
A Discussion of selected references
Table A-67 (continued)
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cation n z r x /Å r e /Å m z b z M z,n B z,n S m /
–1
J·K
–1·mol
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S m (calc.)/
–1
J·K
–1·mol
| Δ S |
m
Ba 2+ 6 2 1.35 3.23 9.46 99.83 − 120.00 156.56 8.40 (a) 33.28 24.88
Am 2+ 7 2 1.21 3.09 9.46 99.83 − 130.00 166.015 − 1.00 (c) − 9.49 8.50
Ni 2+ 6 2 0.69 2.57 9.46 99.83 − 120.00 156.56 − 131.80 (d) − 126.40 5.40
Cr 3+ 6 3 0.62 3.44 10.18 159.56 − 113.33 220.66 − 317.98 (e) − 317.36 0.62
Al 3+ 6 3 0.535 3.355 10.18 159.56 − 113.33 220.66 − 325.00 (a) − 348.79 23.79
U 3+ 6 3 1.025 3.845 10.18 159.56 − 113.33 220.66 − 188.17 (c) − 186.69 1.48
Np 3+ 6 3 1.01 3.83 10.18 159.56 − 113.33 220.66 − 193.58 (c) − 191.03 2.55
Pu 3+ 6 3 1.00 3.82 10.18 159.56 − 113.33 220.66 − 184.51 (c) − 193.95 9.44
Am 3+ 6 3 0.975 3.795 10.18 159.56 − 113.33 220.66 − 201.00 (c) − 201.31 0.31
Am 3+ 8 3 1.09 3.91 10.18 159.56 − 126.67 241.03 − 201.00 (f) − 211.43 10.43
U 4+ 6 4 0.89 4.65 10.55 219.29 − 110.00 282.57 − 416.89 (c) − 401.33 15.57
U 4+ 9 4 1.05 4.81 10.55 219.29 − 125.00 314.22 − 416.89 (f) − 425.02 8.13
Np 4+ 6 4 0.87 4.63 10.55 219.29 − 110.00 282.57 − 426.39 (c) − 408.17 18.22
Pu 4+ 6 4 0.86 4.62 10.55 219.29 − 110.00 282.57 − 414.53 (c) − 411.61 2.92
Am 4+ 6 4 0.85 4.61 10.55 219.29 − 110.00 282.57 − 406.00 (c) − 415.07 9.07
Zr 4+ 6 4 0.72 4.48 10.55 219.29 − 110.00 282.57 − 490.57 (g) − 461.42 29.15
Th 4+ 9 4 1.09 4.85 10.55 219.29 − 125.00 314.22 − 422.58 (h) − 410.67 11.91
Sn 4+ 6 4 0.69 4.45 10.55 219.29 − 110.00 282.57 − 472.50
10.23
References: (a): [1989COX/WAG]; (b): [2005OLI/NOL]; (c): [2003GUI/FAN]; (d): [2005GAM/BUG];
(e): [1976DEL/HAL]; (f): [1992SAS/SHO]; (g): [2005BRO/CUR]; (h): [1982WAG/EVA].
This value can be compared with that obtained by the modified Powell and
Latimer correlation, Appendix A entry [1951POW/LAT].
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S m /J·K –1·mol –1 = 1.5·(R/J·K –1·mol –1 )·ln(M/g·mol –1 ) + (156.84 ± 0.26)
– (1237.62 ± 2.14)·z·(Å/r e ) 2
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S m (Sn 4+ –1
, 298.15 K) = − (468 ± 33) J·K
–1·mol
Although the correlations of [1992SAS/SHO] and [1951POW/LAT] are
completely different, the predictions of S (Sn 4+ , 298.15 K) are similar.
[1992TAY/COD]
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m
The 119 Sn NMR spectra were used to investigate the aquohalostannate(IV) complexes
formed by SnCl 4 (aq) and SnBr 4 (aq) in aqueous and hydrohalic acid solutions.
Characteristic chem. shifts were assigned to the complex cations [SnX(H 2 O) 5 ] 3+ ,
[SnX 2 (H 2 O) 4 ] 2+ and [SnX 3 (H 2 O) 3 ] + , [SnX 4 (H 2 O) 2 ], and the complex anions
[SnX 5 (H 2 O)] – and [SnX 6 ] 2– (where X = Cl or Br); including the pairs of cis/trans or
CHEMICAL THERMODYNAMICS OF TIN, ISBN 978-92-64-99206-1, © OECD 2012