Salcomine
Encyclopedia
Salcomine is a coordination complex derived from the salen ligand
and cobalt. The complex, which is planar, and a variety of its derivatives are carriers for O2
as well as oxidation catalysts.
s, as is typical for complexes of d7 metals. In addition to oxygen and nitrogen donor sites provided by the salen2-, the metal typically is bound to pyridine
(py) to give the complex Co(salen)(py). Such complexes bind O2 to give derivatives of the type (μ-O2)[Co(salen)py]2 and [Co(salen)py(O2)].
Salcomine is commercially available. It may be easily synthesized from cobalt(II) acetate
and salenH2
:
Salen ligand
Salen is the abbreviation for a popular chelating ligand used in coordination chemistry and homogeneous catalysis. The name salen is a contraction for salicylaldehyde and ethylenediamine. The ligand is a bright yellow micaceous solid that is soluble in polar organic solvents.-Nomenclature:The...
and cobalt. The complex, which is planar, and a variety of its derivatives are carriers for O2
Dioxygen complex
Dioxygen complexes are coordination compounds that contain O2 as a ligand. The study of these compounds is inspired by oxygen-carrying proteins such as myoglobin, hemoglobin, hemerythrin, and hemocyanin. Several transition metals form complexes with O2, and many of these complexes form reversibly...
as well as oxidation catalysts.
Preparation and structure
The compound features square planar Co(II). It forms a variety of five-coordinate adductAdduct
An adduct is a product of a direct addition of two or more distinct molecules, resulting in a single reaction product containing all atoms of all components. The resultant is considered a distinct molecular species...
s, as is typical for complexes of d7 metals. In addition to oxygen and nitrogen donor sites provided by the salen2-, the metal typically is bound to pyridine
Pyridine
Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N. It is structurally related to benzene, with one C-H group replaced by a nitrogen atom...
(py) to give the complex Co(salen)(py). Such complexes bind O2 to give derivatives of the type (μ-O2)[Co(salen)py]2 and [Co(salen)py(O2)].
Salcomine is commercially available. It may be easily synthesized from cobalt(II) acetate
Cobalt(II) acetate
Cobalt acetate is the cobalt salt of acetic acid. It may also be found as the tetrahydrate.It may be formed by the reaction between cobalt oxide or hydroxide and acetic acid:...
and salenH2
Salen ligand
Salen is the abbreviation for a popular chelating ligand used in coordination chemistry and homogeneous catalysis. The name salen is a contraction for salicylaldehyde and ethylenediamine. The ligand is a bright yellow micaceous solid that is soluble in polar organic solvents.-Nomenclature:The...
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