Abstract
The reaction of dithizone (H2dtz) with an organometallic rhenium(I) precursor; [Re(CO)5Cl] in ethanol led to the isolation of the octahedral organometallic fac-[Re(CO)3]+ core complex fac-[Re(CO)3(Hdtz)(dttz)] (1). The chelating ligand 1,2-diphenyltetrazolethione-5 zwitterion (dttz) in 1 was formed from the double deprotonation and cyclisation of dithizone in ethanol. The cyclisation of H2dtz to dttz zwitterion is a good example of the conversion of N,S-donor dithizone to S-donor ligand. Both dithizone anion Hdtzâ and neutral zwitterion dttz coordinated to the fac-[Re(CO)3]+ core in which Hdtzâ is coordinated as bidentate chelate via thiolate sulfur and azoic nitrogen atoms while dttz coordinated as monodentate ligand via thione sulfur atom. In addition to the synthesis, infra-red, 1H NMR, electronic properties and X-ray crystal structure of the complex 1 are reported.
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