The Complexes as Particle Donors

Another definition of complexes exists that is of some utility in analytical chemistry. It must be ascribed to G. Chariot et ah A complexe is an entity which is able to donate a particle, ionized or not. (Of course, the word particle must not be endowed with the nuclear meaning but, simply, with the meaning of ligand. ) Hence, a complex is a particle donor and the latter is the ligand. To the complex (donor) corresponds a conjugate species called the particle acceptor. The donor and the acceptor are linked by the relation 

For example, the tetraamminecopper(II) complex is a donor of the particle ammoniac, whereas the copper ion is the acceptor. The proton and the electron whose exchanges define the acid-base and redox phenomena are excluded from the set of particles implied in Chariot s definition, as are the nuclear ones. With this definition, the analogy of the complexation phenomena with the acid-base and the redox ones becomes evident. 

Let s consider the following two compounds, the dichloromercury(II) [HgCb] and the monoamminesilver(I) [Ag(NH3)+] complexes. According to the following 

A global complexation reaction becomes, with these considerations, a competition for the particlep between two donor-acceptor couples. 

A particular case is that of the particle solvation. For consistency in the definition, the following reaction is indeed warranted  

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