oa South African Journal of Chemistry - Rhenium(V) complexes containing mono- and tridentate imido ligands : crystal structures, spectroscopic results and DFT optimization : research article
|Article Title||Rhenium(V) complexes containing mono- and tridentate imido ligands : crystal structures, spectroscopic results and DFT optimization : research article|
|© Publisher:||South African Chemical Institute (SACI)|
|Journal||South African Journal of Chemistry|
|Affiliations||1 Nelson Mandela Metropolitan University, 2 Nelson Mandela Metropolitan University, 3 Nelson Mandela Metropolitan University, 4 Siirt University, Turkey, 5 Bogazici University, Turkey and 6 Bogazici University, Turkey|
|Publication Date||Jan 2014|
|Pages||189 - 197|
|Keyword(s)||'2 + 1' coordination, DFT, Rhenium(V), Tridentate imido and X-ray crystal structures|
Rhenium(V) complexes containing the [ReX(PPh3)2]4+ (X = Br, I) moiety were studied. The reaction of N-(2-aminophenyl)salicylideneimine (H3pna) with trans-[ReOBr3(PPh3)2] produced the complex salt [Re(pna)Br(PPh3)2]0.5Br.0.5(ReO4) (1), in which the tridentate ligand pna is coordinated via a doubly deprotonated nitrogen (as an imide), an imino nitrogen and a deprotonated phenolate oxygen atom. The reaction of trans-[ReO(OEt)I2(PPh3)2] with two equivalents of 2-aminophenol (H3ap) in ethanol led to the isolation of the '2+1' complex salt [Re(Hap)(H2ap)I(PPh3)2]I (2) in good yield. The Hap ligand is coordinated monodentately via the doubly deprotonated imido nitrogen, and H2ap is chelated bidentately through the neutral amino nitrogen and a deprotonated phenolate oxygen atom. The crystal structures of 1 and 2 were determined by X-ray single crystal diffraction. Spectroscopic results and DFT calculations are also reported.
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