Crystals of hexaiodoplatinates(IV) M2PtIe (M = K, Rb, Cs, NH4, Tl) have been obtained by heating PtI4 or H2FtCl6 in highly concentrated aqueous solutions of MI in the presence of small amounts of HI and I2 in an ampoule for 24 h at 160 °C. The structural parameters were determined from single crystal data. In water less soluble compounds with M = Rb, Cs, NH4 show the cubic K2PtCl6 structure, whereas the easily water soluble salts with M = K, Tl both crystallize in a tetragonally distorted version of this structure type.
room temperature with insertion of the alkyne into the metalcarbene bond to give alkenyl(amin0)carbene complexes[2]. On warming a typical representative of this class of compounds, pentacarbonyl[diethylamino(cL-diethylamino-P-methoxystyryl)carbene]chromium ( I ) , in decane, a CO ligand cis to the carbene ligand is substituted intramolecularly by the amino function of the styryl substituent, leading to formation of the tetracarbonyl complex (2). Stronger heating of the solution results in the loss of further CO and attack of the carbene-carbon at the ortho position of the phenyl ring. Thus cyclization occurs to give the 2,3-bis(diethylamino)-l-methoxyindene, which remains coordinated as the tricarbonyl complex ( 3 )
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