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- Four In(III) xanthate complexes, [In(S2COR)3] where R = Me, Et, iPr and sBu, respectively, were synthesized, characterized and subsequently used as single source molecular precursors via a solventless thermolysis route to obtain indium sulfide materials. By choice of precursor and reaction temperature crystalline powders of tetragonal In2S3, cubic In2S3 and cubic In2.77S4 were acquired. The phase identification and purity were conducted through examination of the experimental powder X-ray diffraction patterns relative to the simulated patterns for single X-ray crystal diffraction.
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- A series of Fe(III), Co(III), Ni(II), Cu(II), Zn(II) and In(III) N-morpholine-N'-benzoyl thiourea complexes have been synthesized and characterized by elemental analysis, thermal analysis, infrared spectroscopy, 1H nuclear magnetic resonance spectroscopy and single-crystal X-ray crystallography. Thermogravimetric analysis shows that all the complexes undergo a two-step decomposition process except for the iron(III) complex and the indium(III) complexes, which show three-step and one-step decompositions, respectively. The complexes are thermally stable up to approximately 300°C. The ligand coordinates the various metal ions in a bidentate (L-kO,S) chelating mode, facilitated by deprotonation of the acidic amide (–C(O) N'HC (S)) moiety. This mode of coordination allows for the facile formation of neutral bis/tris-6-membered chelates of type [M(L-kS,O)x] where x = 2 or 3 for divalent or trivalent metal ions, respectively.
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