Thermal properties, gold complexes

Figure 8.5 Thermal properties of gold complexes with isocyanides having a phenyl or a biphenyl core.

Several dinuclear units have been assembled to form linear Au5 + and Ane complexes. However, they were shown to be Au An mixed-valent compounds. The normal Au -Au distances are in the range 2.5-2.7A. The only binuclear gold(II) complex (15) with unsupported Au Au bond has been shown to possess interesting photophysical and thermal redox properties." ... 

Concentration and temperature inversion of the catalytic properties of gold, platinum, osmiirm, and palladium chlorides at thermal and initiated polymerization of styrene and MMA has been discovered. The meehanism of ambiguous action of noble metal salts is caused by the competition of the initiating inOrence of monomer complexes with colloidal metal partieles and the inhibition reaction proceeding by ligand transfer. 

Like in other areas of homogeneous catalysis, soon after the isolation of the first free Al-heterocyclic carbene (NHC) by Arduengo et al. [2], NHCs were employed as ancillary ligands in gold catalysis [3]. From this point on, due to their unique electronic and steric properties, their high tolerance against moisture and air, as well as their thermal stability, which exceeds that of the phosphine complexes, NHC-gold(I) complexes became a serious alternative to the commonly used catalysts [4,5]. 

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