Open AccessNew hypercoordinated triaryltelluronium derivatives of oraganophosphorus ligands. Synthesis and structural characterization
Author(s) -
Eleonóra Dénes,
M. Vlassa,
Cristian Silvestru,
Anca Silvestru
Publication year - 2021
Publication title -
revue roumaine de chimie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.135
H-Index - 21
ISSN - 0035-3930
DOI - 10.33224/rrch.2021.66.1.03
Subject(s) - chemistry , intramolecular force , molar conductivity , tellurium , octahedron , crystallography , metathesis , supramolecular chemistry , nuclear magnetic resonance spectroscopy , crystal structure , stereochemistry , inorganic chemistry , elemental analysis , organic chemistry , polymerization , polymer
Hypercoordinated triaryltelluronium compounds of type [{2-(Me2NCH2)C6H4}3Te]+L [L = (SPMe2)2N (1), (OPPh2)2N (2), (SPPh2)2N (3), (SPPh2){OP(OEt)2}N (4), (SPPh2)(O2SMe)N (5) and {SP(OEt)2}(O2SC6H4Cl-4)N (6)] were prepared by salt metathesis reactions between [{2-(Me2NCH2)C6H4}3Te]Cl•H2O and the potassium salts of the corresponding organophosphorus ligands in a 1:1 molar ratio. Multinuclear NMR spectroscopy, mass spectrometry, molar conductivity and IR spectroscopy were used to characterize the new complexes. The 1H NMR spectra suggest for all compounds the intramolecular coordination of the nitrogen atoms from the pendant arms to tellurium in solution. For compound 3 single-crystal X-ray diffraction studies revealed strong N→Te intramolecular interactions in solid state, which result in hypercoordinated triaryltelluronium(IV) cations (14‒Te‒6 species) with a distorted octahedral coordination geometry around tellurium. Weak S⋅⋅⋅H interactions between anions and cations resulted in a 2D supramolecular network.