With pseudohalides

Treichel, Knebel, and Hess provided further data on these systems by studying reactions of [Pt(PRj)2(CNCH3)2] with various halide ions and with pseudohalides. A series of five-coordinate complexes were obtained from reactions with iodide ion (PRj = PPhj, PPh2Me, PPhMe2, PEtj), and a study was carried out to measure the stability of these complexes with respect to ligand loss 155). Stability constants for several of these complexes were obtained from spectroscopic data. Other reactants (Cl, Br, CN, SCN) generally yielded the appropriate [Pt(PRj)2(CNCH3)X] species, as expected. 

Boron trichloride has been reported to react with pseudohalide ions to give the mixed halogen-pseudohalogen ions BCl Z4 n (Z = CN-, NCO NCS, N3 ), none of which were isolated (107). However, only for the BC1 (CN)4 series were any individual mixed-ion llB resonances reported. The BX3OMe" ions [X = F (117), Cl (54), Br (54)) apparently disproportionate rapidly to give the BX4 ions. Early reports of fluorine-containing BF X4 species (X = halide, hydroxyl, etc.) have been summarized (162). 

In addition, the optimized reaction conditions (PdCl2(MeCN)2-dppp-Cs2C03) have been further appUed for the coupling of less hindered tosylhydrazones with aryl halides or pseudohalides - see (13). Six 1,1-diarylethylenes with polyoxygen substituents oti the aromatic rings were prepared. More reactions of tosylhydrazone with pseudohalides will be introduced later. 

Table 3. Experimental (calculated) energy level splittings and AOM parameters of pentaam-mine complexes with pseudohalide ligands as obtained from quartet and doublet transition energies (all in cm" )...

Tetraorganogermanes containing (iso-)cyano and (iso-)thiocyano groups linked to carbon are listed at the bottom of Table 11. Additional derivatives with pseudohalides not directly linked to Ge are listed in Chapters... 

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