Abstract
The title compound was obtained by reacting HAuCl 4 with the uracil derivative in ethanol. X-ray work ( P2 1/ c, a=11.896(6), b=12.331(5), c= 13.501(4) Å, β=121.46(3)°, R=0.038, 2096 observed reflections) shows that the crystal contains individual complex molecules in which the metal has a slightly distorted square-planar coordination. Two cis corners are occupied by Cl ligands. The uracil derivative forms a six-membered chelate ring via the deprotonated amino group and the phenyl- substituted nitrogen atom of the azo group. The thermal behavior of the free ligand and its Au complex has been determined from thermogravimetric and differential scanning calorimetric measurements.
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