Potassium tetrachloroaurate .dihydrate

Potassium tetrachloroaurate dihydrate KAuCl3-2H30 13682-61-6 413.908 yel monoci cry s H,0, EtOH, eth... 

The reaction of 5,10,15,20-tetraphenyl-p-benziporphyrin, sodium tetrachloroaurate(iii) dihydrate, and potassium carbonate in dichloro-methane, carried out by Szyszko et yielded gold(in) 5,10,15,20-tet-raphenyl-21-carbaporphyrin owing to the contraction of p-phenylene to cyclopentadiene. This molecule is the very first representative of a true 5,10,15,20-tetraphenyl-21-carbaporphyrin complex where four trigonal donor atoms are involved in equatorial coordination. The NMR spectrum of this Au complex resembles the basic pattern of aromatic carbaporphyrinoids with an AB spin system at d = 8.78, H(7,18), and 8.67 ppm, H(8,17) with a coupling, /hh of 4.9 Hz, which is typical of the pyrrole ring in porphyrinoids. 

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