oa South African Journal of Chemistry - Coordination of tridentate Schiff base derivatives of 4-aminoantipyrine to rhenium (V) : research article



The potentially tridentate Schiff base derivatives Hnap and Hoap were synthesized by the condensation reaction of 4-amino-2,3-dimethyl-1-phenyl-5-pyrazoline (4-aminoantipyrine)with 2-aminobenzaldehyde and salicylaldehyde, respectively. The reaction of Hnap with [ReOBr(PPh)] and -[ReOI(PPh)] gives rise to the products [Re(nap)Br(PPh)]Br and [ReO(OEt)(Hnap)(PPh)]I , respectively. In the ligand nap is coordinated as a tridentate imido-imino-ketone, while in Hnap is bonded as an amido-imino-ketone. The reaction of Hoap with [ReOI(PPh)] affords the product [ReO(OMe)(oap)(PPh)]I . Spectroscopic data and the X-ray crystal structures of compounds are reported.


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