Complexed silver atom

The transient product of the reduction of complexed silver ions is not the isolated atom but a complexed silver atom, Ag (CN)2 -, ... 

Figure 6. Ionization potentials of silver atoms in the gas phase, and of different complexed silver atoms in water.

The band maxima of metal species are different in the gaseous and condensed phases. The optical absorption bands of Ag° and Ag2 are highly dependent on the environment [45]. As shown in Table 1 and Fig. 2, the influence of the interaction of ligands CN, NH3, or EDTA with the atom or the dimer is important [46]. The transient product of the reduction in water of complexed silver ions is not the isolated atom but a complexed silver atom, Ag°(CN)2 [37], Ag°(NH3)2 [47], or Ag (EDTA) [37,48], respectively (Fig. 2), as well... 

Olefin Complexes. Silver ion forms complexes with olefins and many aromatic compounds. As a general rule, the stabihty of olefin complexes decreases as alkyl groups are substituted for the hydrogen bonded to the ethylene carbon atoms (19). 

Techniques other than UV-visible spectroscopy have been used in matrix-isolation studies of Ag see, for example, some early ESR studies by Kasai and McLeod 56). The fluorescence spectra of Ag atoms isolated in noble-gas matrices have been recorded (76,147), and found to show large Stokes shifts when optically excited via a Si j — atomic transition which is threefold split in the matrix by spin-orbit and vibronic interactions. The large Stokes shifts may be explained in terms of an excited state silver atom-matrix cage complex in this... 

Thereby, the presence of tertiary monophosphines is critical, because both polymeric (26) and cyclic tetrameric (24 and 25) complexes can be obtained depending on the phosphine added to the reaction mixture. Furthermore, with some of the phosphines rapid decomposition and deposition of metallic silver occurs. In the macrocyclic molecules 24 and 25 a pair of silver atoms is bridged by two bis(l-imidazolyl)borate moieties, with a transannular Ag Ag distance of 8.61 A for 24 and 8.89 A for 25. The conformations of 24 and 25 are... 

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