Palladium analytical data

The analytical data for this dark red complex suggest a Pd P ratio of somewhere between 3 4 and 3 5 indicating a trimeric palladium skeleton which is a common structural unit in palladium chemistry (4). The infrared spectrum (Nujol) is quite complex in the carbonyl region and shows clearly that bo termini ( 0 0 18, 1843, 1810 cm ) and bridging (Oq) 1765, 1750, 1735 cm" ) CO are present. The P NMR spectrum at room temperature shows only an unresolved broad hump at 8 13. At higher temperatures, this sharpens considerably while at lower temperatures (ca. -25° C), the spectrum exhibits three poorly-resolved absorptions at about 5 25, 18 and 0. A solid state P MAS spectrum (room temperature) is similar in appearance but is much better resolved with absorptions at 5 23.5, 15.0,... 

The nc value for palladium-hydrogen is 0.25 from magnetic susceptibility measurements (52) with Tc = 564°K (52), and from P-C-T data, de Ribaupierre and Manchester (26) estimate nc = 0.29 and Tc = 566°K. The Bragg-Williams approximation gives a reasonable WfiH value by using an average value of nc, the critical temperature, and an analytical expression for ie(n) determined... 

Arasabenzene, with chromium, 5, 339 Arcyriacyanin A, via Heck couplings, 11, 320 Arduengo-type carbenes with titanium(IV), 4, 366 with vanadium, 5, 10 (Arene(chromium carbonyls analytical applications, 5, 261 benzyl cation stabilization, 5, 245 biomedical applications, 5, 260 chiral, as asymmetric catalysis ligands, 5, 241 chromatographic separation, 5, 239 cine and tele nucleophilic substitutions, 5, 236 kinetic and mechanistic studies, 5, 257 liquid crystalline behaviour, 5, 262 lithiations and electrophile reactions, 5, 236 as main polymer chain unit, 5, 251 mass spectroscopic studies, 5, 256 miscellaneous compounds, 5, 258 NMR studies, 5, 255 palladium coupling, 5, 239 polymer-bound complexes, 5, 250 spectroscopic studies, 5, 256 X-ray data analysis, 5, 257... 

The understanding of the palladium-phenanthroline catalytic system has been greatly advanced by the isolation of a plausible reaction intermediate [102]. Based on analytical and spectroscopic data, the following structure was proposed for the isolated complex ... 

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