342 S. P. Sadiler on Iridium Compounds. 
compound, Several different crystallizations of it were analysed. 
Tt could not always be entirely separated from the slight crust 
of decomposed KCl which separated out along with and among 
the crystals, 
Preparation No 1. Large well-formed crystals, with but very 
little foreign matter adhering to the sides. 
‘1567 grms. dried over H,SO, lost by heating to 100° 0170 
grms. = 10°85 pr. ct.: 
gave ‘0525 grms. metallic iridium = 33°50 pr. ct. : 
gave also 2275 germs. AgCl = -0563 grms. Cl = 35:92 pr. ct. 
1610 grms. dried over H,SO, lost by heating to 100° 0172 
grms. = 10°68 pr. ct.: 
gave — Ir, determination accidentally spoiled : 
AgCl = 
same. Nor do the percentazes agree with the simple potassic- 
ethylen iridium protochloride IrCl,C,H,KCl1+2H,0 where the 
Ir. = 48-45 pr. et. and Cl = 26-19 pr. ct. : 
If we reckon out the ratio of iridium to chlorine, we find it as 
1:6, showing it to be an iridium-chloride compound. The large 
pr. ct. of loss on heating, the small Ir. and Cl pr. cts., when com- 
pared with double iridium and potassic chloride, and the lumr 
nous flame when burned, all go to show that an organic con- 
ing itself on, we can expect from the consideration of analogous 
compounds met 3 atoms of the bivalent radical C,H, would 
hes 
We would have on this supposition the formula IrCl,(C,H,)s 
(KCl), + xH,O. Now this formula with 3 atoms H,0 gives 
Ir. = 32°93 pr. ct., Cl = 35°61 pr. ct., and with 2 atoms H,9, 
Tr. = 33-95 pr. ct., Cl = 36.71 pr. ct. ; anhydrous it gives In = 
ce 
With the rest, as must be the case here, a partial decomposition 
of the salt enters at 100° alread 
In another preparation, also well stallized, 1822 grms. 
dried at 100°» . Ae essen 
gave 0678 germs, metallic iridium = 37-21 pr.-ct. ; 
Fave also 3063 grms. AgCl = 0758 grms, Cl = 41°59 pr. 
as rae. preparation, indistinctly crystallized, 0502 grms- 
gave 0172 grms. metallic iridium = 34°26 pr. ct. 
a (Probably low from HCl mechanically ssl ang 
