Tris silver complexes

Addition of excess methanol destroys the silver complexes and regenerates the phosphamethin-cyanine salts. It is more advantageous to bind the Ag ions by addition of tris-j cyanoethyl-phosphine. 

This methane based tris-NHC ligand system behaves very similar to its boron based analogue. The most obvious difference is of course its neutral charge compared with the monoanionic borate ligand. As a consequence, the corresponding silver complex [ Agj HC(MeBenzIm)3 )2](BF )3, although supposedly isostructural with the borate complex... 

Figure 3.145 Synthesis of a thallium(l) and a silver(l) tris-NHC complex using ligands with a...

The tris(oxalate) complex (66), which is very soluble in MeOH, may also be readily prepared (equation 63) using silver oxalate. ... 

The solutions must be free from silver complexing agents like chloride, EDTA or Tris buffer. 

SP Datta, AK Grzybowski. Stabilities of the silver complexes of imidazole and tri(hydroxymethyl)-methylamine. J Chem Soc (A) 1059-1064, 1966. 

The acetylide complexes 90 were synthesized on Pt rather than on Pd, due to the lability of the latter metal that precluded isolation of such species other than Pt. These species were accessed as neutral analogs of related Ag(l) complexes in order to try to delineate the effect on the mesomorphism of the charge on the silver complexes and how this might relate to the stability of the cubic phase seen extensively in the silver complexes.The Pt-acetylide complexes turned out to be predominantly nematic in their phase behavior and the consequences in relation to cubic phase behavior were discussed. Curiously, however, the complexes did, in addition, show a SmC phase. It is almost universally true that liquid crystals bearing lateral chains show only nematic phases,and so this aspect of the behavior of Pt complexes still requires explanation. 

The silver complex (4-i-C3F7pz)Ag was found to be soluble in acetone where it was tetrameric. In general, silver pyrazolides were found to be remarkably insensitive to light, The crystal structure of tris(l-phenyl-3,5-dimethylpyrazole)silver(I) nitrate (3) has been determined. The Ag" ion sat at the centre of a trian e of 3 Ns from the pyrazole rings and the Ag—bond lengths were about 224 pm. The nitrate groups were situated between the silver ions in the crystal lattice but the separations were of the order of 550-700 pm—too far... 

The arsine complex (Ph3As)AuOSiMea was similarly prepared. The tris-(phosphine)-copper and -silver complexes and the gold complexes are monomeric, with two-co-ordinate metal the mono- and bis-(phosphine)-copper and -silver siloxanes are oligomers (38) and (39), with bridging... 

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