Sunil Verma,
- Professor, Department of Humanities and Applied Sciences, Echelon Institute of Technology, Faridabad, Haryana, India
Abstract
The synthesis and characterization of a number of aminophenyl(p-hydroxyphenyl)tellurium(IV) dichlorides with the general formula RR´TeCl₂—where R stands for the p-hydroxyphenyl group and R´ denotes substituted amino aromatic moieties like aniline, N-methylaniline, and N,N-dimethylaniline—are reported in this study. Because of their distinctive structural characteristics, adaptable bonding behavior, and prospective uses in organic synthesis, catalysis, and medicinal chemistry, organotellurium compounds have garnered a lot of interest. The coordination behavior and electrical characteristics of these compounds are further improved by the addition of hydroxy and amino functional groups to the tellurium framework. Proton magnetic resonance (PMR) spectroscopy, elemental analysis, conductance measurements, cryoscopic studies, and far-infrared spectroscopy were used to characterize the synthesized tellurium (IV) dichlorides that were obtained by appropriate synthetic procedures. Low molar conductance values from conductance studies in suitable solvents suggested that the synthesized compounds in solution were molecular and non-electrolytic. The suggested stoichiometry of the compounds was validated, and the monomeric behavior was further corroborated by cryoscopic molecular weight measurements. Significant structural information on the coordinating environment surrounding the tellurium core was obtained from far-infrared spectral studies. The para-substitution of the amino aromatic moiety to RTeCl₂ was established based on measured vibrational bands. Understanding the bonding properties between the tellurium atom and the organic moiety was greatly aided by PMR spectrum studies. The suggested molecular structures were corroborated by the chemical shift values and splitting patterns, which verified the existence of the substituted phenyl groups. For these aminophenyl (p-hydroxyphenyl)tellurium (IV) dichlorides, a pseudo-trigonal-bipyramidal geometry has been proposed based on the combined analytical and spectral evidence. The research provides important new information about the bonding properties and structural chemistry of organotellurium compounds with amino-substituted aromatic ligands.
Keywords: Organotellurium compounds; Tellurium(IV) dichlorides; Aminophenyl derivatives; PMR spectroscopy; far-infrared spectroscopy; trigonal-bipyramidal geometry
[This article belongs to Journal of Modern Chemistry & Chemical Technology ]
References
- Engman L. Tellurium(IV) chloride. In: Encyclopedia of Reagents for Organic Synthesis. Vol. IV. Chichester: John Wiley & Sons Ltd; 2001. doi:10.1002/047084289X.rt003.
- Petragnani N, Stefani HA. Tellurium in Organic Synthesis: Second, Updated and Enlarged Edition. 2nd ed. Amsterdam: Elsevier; 2007.
- Al-Rubaie AZ, Al-Salim NI, Al-Jadaan SAN. Synthesis and characterization of new organotellurium compounds containing an ortho-amino group. J Organomet Chem. 1993;443(1):67-70. doi:10.1016/0022-328X(93)80010-9.
- Al-Rubaie AZ, Al-Jadaan SAS, Abd Al-Wahed AT, Raadah IA. Synthesis, characterization and biological studies of some new organometallic compounds containing mercury, selenium and tellurium based on p-aminobenzoic acid. J Phys Conf Ser. 2021;2063:012003. doi:10.1088/1742-6596/2063/1/012003.
- Ziolo RF, Pritchett K. Organotellurium compounds. J Organomet Chem. 1976;116(2):211-217. doi:10.1016/S0022-328X(00)91794-7.
- Bhardwaj A, Kumar M, Bendi A, Garg S. Theoretical and experimental in-vitro studies of novel thiophene based organotellurium(IV) complexes. Chem Biodivers. 2024;21(2). doi:10.1002/cbdv.202301544. PMID:38163258.
- Beckmann J, Heitz S, Hesse M. Four distinctively different decomposition pathways of metastable supermesityltellurium(IV) trichloride. Inorg Chem. 2007;46(8):3275-3282. doi:10.1021/ic062469m. PMID:17375915.
- Al-Rubaie AZ, Al-Jadaan SAS. Synthesis and polycondensation of some new organotellurium compounds containing hydroxymethyl groups. Appl Organomet Chem. 2002;16(11):649-654. doi:10.1002/aoc.369.
- Maurya C, Bajpai S, Deepak D, Kamboj M, Butcher RJ. Synthesis and spectral characterization of telluroxanes [C4H7(CH3)Te(OH)(NO3)], [(C2H5)2Te(NO3)]2O, C4H8Te(C2O4), and (C2H5)2Te(C2O4): Single crystal X-ray study of [(C2H5)2Te(NO3)]2O. Phosphorus Sulfur Silicon Relat Elem. 2025;200(12):934-941. doi:10.1080/10426507.2025.2554282.
- Singh HB, Sudha N. Organotellurium precursors for metal organic chemical vapour deposition (MOCVD) of mercury cadmium telluride (MCT). Polyhedron. 1996;15(5-6):745-763. doi:10.1016/0277-5387(95)00249-X.
Journal of Modern Chemistry & Chemical Technology
| Volume | 17 | |
| Issue | 02 | |
| Received | 23/07/2025 | |
| Accepted | 20/05/2026 | |
| Published | 30/05/2026 | |
| Publication Time | 311 Days |