Synthese,Komplexbildung und Kristallstrukturen von Cyclotriphosphazenen mit Pyridylalkylaminogruppen |
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Authors: | Marcel Bloy Michael Kretschmann Sabine Scholz Matthias Teichert Ursula Diefenbach |
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Abstract: | Synthesis, Complex Formation and Crystal Structures of Cyclotriphosphazenes with Pyridylalkylamino Groups A variety of cyclotriphosphazenes with different numbers and types of functional pyridylalkylamino groups were synthesized by reactions of chlorophosphazenes with aminoalkylpyridine derivatives and completely characterized. The molecular structures of one multifunctional N‐donor ligand, N3P3(OC6H5)5(NHCH2CH2C5H4N‐2) ( 1 ), was determined by X‐ray structure analysis. The hexafunctionalized derivative N3P3(NHCH2CH2C5H4N‐2)6 ( 10 ) reacts with dichloromethane to form the HCl salt ( 10 a ) the structure of which could also determined by X‐ray crystal structure analysis. Complex formation of N3P3(OC6H5)5(NHCH2C5H4N‐3) ( 2 ) with cobalt(II) chloride yields the cobalt complex ( 2 a ) in which two molecules of the ligand are bonded to the tetrahedraly coordinated cobalt atom by the pyridine nitrogen atoms. The tetra functionalized ligand gem‐N3P3(OC6H5)2(NHCH2CH2C5H4N‐2)4 ( 8 ) forms the dinuclear cobalt‐cobaltate complex ( 8 a ) by interactions of a phosphazene nitrogen atom and the pyridine atoms of two cis‐vicinal functional groups with a CoCl unit and a pyridine group with a CoCl3‐unit. |
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Keywords: | Phosphazenes Cobalt(II) complexes Cobalt– cobaltate |
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