A Comprehensive Treatise on Inorganic and Theoretical Chemistry

PLATINUM 249
Ze.it. phya. Chem., 28. 647, 1899 ; J. Jacobsen, Compt. Mend., 149. 575, 1909 ; K. Kautsky and
W. Baumeister, Ber., 64. B, 2446, 1931 ; F. Kohlrausch, Ze.it. phya. Chem., 33. 267, 190O ;
H. Kolbe, Journ. prakt. Chem., (2), 2. 217, 1870 ; P. Laffitte and P. Orandadam, French Pat.
No. 785082, 1935; Bruxelles Congr. Chem. Ind., 15. 339, 1936; J. Landaucr, Ber., 5. 406, 1872;
C. Marie, Journ. CMm. Phya., 6. 596, 1908; Compt. Rend., 146. 477, 1908 ; JS. von Meyer, Journ.
praht. Chem., (2), 14. 130, 1876 ; W. Odling, Proc. Roy. Inst., 6. 176, 1872 ; Chem. News, 21.
269, 289, 1870 ; Zeit. Chem., (2), 6. 435, 1870 ; Ber., 3. 682, 1870 ; S. W. Pennycuik, Journ.
Chem. Soc., 2108, 1928 ; J. Piazza, Anal. Soc. Cient. Santa, Fe, 6. 23, 1934 ; L. Pigeon,
Recherche chimique et calorimetrique sur quelques combinaisons halo'ides du platine, Paris, 1893 ;
Ann. Chim. Phys., (7), 2. 481, 1894 ; W. J. Pope and S. J. Peachey, Journ. Chem. Soc.,
95. 671, 1909 ; E. Prost, Bull. Acad. BeIg., (3), 11. 414, 1886 ; Bull. Soc. Chim., (2), 46. 157,
1886 ; A. Rosenheim, Ber., 24. 2397, 1891 ; L. Schaffner, Eiebig's Ann., 51. 182, 1844 ;
E. P. Schoch, Journ. Phys. Chem., 14. 665, 191O ; W. F. Short, Journ. Soc. Chem. Ind.,
55. 14, T, 1936 ; G. P. Thomson, N. Stuart and C. A. Murison, Proc. Phys. Soc., 45. 381,
1933; H. Topsoe, Tids. Fys. Kemi, 7. 321, 1870; Ber., 3. 463, 187O; V. Voorhees and
R. Adams, Journ. Amer. Chem. Soc., 44. 1397, 1922 ; W. H. Wahl, Journ. Franklin Inst.,
100. 68, 189O ; Chem. News, 62. 33, 4O, 1890; C. Weltzien, Licbig's Ann., 97. 27, 1856 ;
G. C. Wittstein, ib., 44. 276, 1842 ; Repert. Pharm., 74. 43, 1841 ; L. Wohler, Ber., 36. 3496,
1903 ; Die pseudokatalytische Saueraktivierung des Platins, Karlsruhe, 1901 ; Zeit. anorg.
Chem., 40. 449, 1904 ; Zeit. Elektrochem., 15. 770, 1909 ; .L. Wohler and W. Frey, ib., 15.
132, 1909; L. Wohler and F. Martin, ib., 15. 791, 1909; G. Wyrouboff, Ann. Chim. Phys.,
(8), 13. 549, 1908 ; F. Zambonini, Zeit. Krist., 41. 56, 1906.
2 I. Bellucci, Oazz. Chim. Ital., 35. i, 163, 1905 ; 35. ii, 334, 1905 ; Zeit. anorg. Chem., 44.
173, 1905 ; AtU Accad. Lincei, (5), 12. ii, 635, 1904 ; I. Bellucci and N. Parravano, ib., (5),
13. ii, 307, 1904 ; (5), 14. i, 462, 1905 ; J. J. Berzelius, Jahresber., 9. 110, 1830 ; Lehrbuch der
Chemie, Dresden, 2. i, 177, 1826 ; M. Blondel, Ann. Chim. Phys., (8), 6. 9O, 1905 ; Recherches
sur quelques combinaisons du platine, Paris, 1905 ; H. Davy, Phil. Trans., 98. 1, 1808 ;
J. W. l>6bcreiner, Pogg. Ann., 28. 18O, 1833; Liebig's Ann., 8. 189, 1833; 14. 21, 1835;
K. A. Hofmann and H. Hiendlmaier, Ber., 39. 3184, 1906 ; P. Niggli and W. Nowacki, Zeit.
Kryst., 86. 65, 1933 ; G. Rousseau, Compt. Rend., 109. 145, 1889 ; H. Seifert, Zeit. Kryst., 82.
15, 1932 ; H. G. Soderbaum, Oefvers. Vet. Akad. Forh., 42. IO, 1885 ; S. Tennant, Phil. Trans.,
87. 219, 1797 ; Schrrer's Journ., 1. 308, 1799 ; Journ. Phys., 51. 157, 1800 ; H. Topsoe, Tids.
Fys. Kemi, 7. 321, 1868 ; Ber., 3. 462, 187O.
3 E. Prost, Bull. Accad. BeIg., (3), 11. 414, 1886 ; Bull. Soc. Chim., (2), 46. 157, 1886 ;
L. Wohler, Zeit. anorg. Chem., 40. 433, 1904.
* L. Wohler and F. Martin, Ber., 42. 3326, 1909 ; F. Martin, Vier Oxydationsstufen des
Platins, Karlsruhe, 1909 ; JL. Wohler, Die pseudokatalytische Saucrstnffaktivicrung des Platins,
Karlsruhe, 19Ol ; Zeit. Elektrochem., 15. 771, 1909; Zett. anorg. Chem.. 40. 424, 1904; L.. Wohler
and W. Frey, Zeit. Elektrochem., 15. 132, 1909; F. Haber and S. Grinberg, Zeit. anorg. Chem.,
18. 40, 1898 ; M. Ie Blanc, JLehrbuch der Elektrochemie, Ixjipzig, 261, 1906 ; R. Ruer, Zeit.
Elektrochem., 11. 674, 1905 ; 14. 308, 1908 ; F. Kohlrausch, Wied. Ann., 63. 430, 1897 ;
C. Marie, Compt. Rend., 145. 117, 1907 ; 146. 475, 1908.
6 G. Grube, Zeit. Elektrochem., 16. 632, 1910.
§ 20. Platinum Fluorides
H. Moissan x found that fluorine free from hydrogen fluoride does not attack
platinum below 100°, and combination does not readily occur below 500° to 600°.
If hydrogen fluoride is present, the reaction occurs more readily even in the case of
liquid hydrogen fluoride saturated with fluorine. He prepared platinum difluoride,
or platinous fluoride, PtF2, together with the tetrafluoride, by heating platinum
wire to 500° or 600° in a current of fluorine. C. Poulenc observed that some
difluoride is formed when ammonium fluoplatinate is heated over 300°. According
to H. Moissan, the tetrafluoride is soluble in water, but the difluoride remains
attached to the surface of the metal as an insoluble, green layer. On ignition, it
decomposes into fluorine and platinum. H. Moissan prepared platinous phospnopentafluoride.
J. J. Berzelius reported that when an aq. soln. of potassium fluoride is added
to an aq. soln. of platinic chloride, free from an excess of acid, as long as a precipitate
continues to form, and the filtered liquid evaporated, platinic fluoride may
be extracted from the mass by means of alcohol—potassium chloroplatinate remains.
The alcoholic liquid mixed with water is then evaporated. On cooling to a low
temp., a non-crystalline, yellow, transparent mass is formed which is completely
soluble ; and if a temp, of 60° be employed, the mass becomes dark brown, and