Coordination compounds презентация

Coordination compounds

Processes of formation and destruction of complexes are used: in analytical chemistry; for allocation of chemical elements; in galvanotechnics; for corrosion control; in the production of nuclear fuel; In deactivation practice; for indication of toxic compounds; for production of substances with predetermined properties as catalysts.

General information about coordination compounds According to their contents, chemicals are divided into simple substances (H2, Cl2, O2 etc) and compounds (H2O, H2SO4, Na3PO4). In the late nineteenth century even more complex in structure and composition molecular compounds were produced, they are called complex or coordination compounds. DEFINITIONS: Coordination compounds - are chemical compounds, the lattices of which consist of integrated groups formed by ions or molecules able to exist independently. Coordination compounds - molecular compounds, the formation of which from simple substances is not associated with the occurrence of new electron pairs.

Werner’s coordination theory According to this theory, in each complex compound there is a сentral ion (complexing), other ions, atoms or molecules - ligands (adends) are placed in a certain order around it. The Central ion is associated with ligands by donor-acceptor mechanism, it forms an internal area of the complex. The Central ion is acceptor and ligands are donors of electronic pairs. It is ionic bond between the inner and outer sphere.

The structure of coordination compounds Potassium hexacyanoferrate (III)

Complex compounds :

2. Classification and nomenclature of coordination compounds

Classification of coordination compounds on different grounds

Classification of coordination compounds on different grounds

Classification of coordination compounds on different grounds

Classification of coordination compounds on different grounds

Isomerism of coordination compounds

Isomerism of coordination compounds

Isomerism of coordination compounds

Isomerism of coordination compounds

Complexing constants

With different coordination number

The reaction of complexes with the destruction of the complex 1. The formation of the stronger complex Fe3+ + 6 SCN- = [Fe(SCN)6]3- red color [Fe(SCN)6]3- + 6 F- = 6 SCN- + [FeF6]3- lack of coloration [FeF6]3- + Al3+ = Fe3+ + [AlF6]3-; lack of coloration Fe3+ + 6 SCN- = [Fe(SCN)6]3- red color

Chlorophyll Chlorophyll

Hemoglobin Hemoglobin

THE APPLICATION OF COMPLEXES IN MEDICINE

-antidotes: (Dimercaprol)

THE APPLICATION OF COMPLEXES IN MEDICINE For the lead removing using preparations based on EDTA. The administration of large doses of drugs is dangerous as they bind calcium ions, which leads to violation of many functions. Therefore tetatsin used, CaNa2EDTA, which is used for removing lead, cadmium, mercury, yttrium, cerium and other rare earth metals and cobalt.

-anticancer drug: dihlorodiamminplatinum cis-isomer (cis-platin) cis- [Pt(NH3)2Cl2] cis- [Pt(NH3)4Cl2]

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