Triphenyltellurium chloride

Chopra, Ambika; Jain, Shreyansh; Srivastava, Sanjay K.; Gupta, Sushil K.; Butcher, Ray J.

doi:10.1107/s160053681400498x

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…As an additional comparison, the [TePh 3 ] fragment can be compared to a tetrameric Ph 3 TeCl crystal that was obtained from the crude reaction mixture of 3 . Similar to a previously reported dimeric structure, though dissimilar to monomeric Ph 3 TeCl, the Te–C ipso distances cover a small range of 2.123(2)–2.144(1) Å and C ipso –Te–C ipso angles are similarly regular over the range of 92.65(5)–96.14(6)°. The regularity observed within the [TePh 3 ] fragments points toward very little contribution from a proposed η 1 -Cp R -TePh 3 see-saw geometry, common to many Te IV complexes.…”

Section: Results and Discussionsupporting

confidence: 86%

Late to the Party: Synthesis and Characterization of Tellurium and Selenium Half-Sandwich Complexes

et al. 2021

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We report the synthesis and characterization of the first series of tellurium and selenium complexes featuring an η 5cyclopentadienyl ligand. Reaction of Ph 3 TeX (X = Cl, S 2 CNEt 2 ) with MCp R (M = Li, K; R = H, Me 4 , Me 5 ) results in high yields of [Cp][TePh 3 ] (1), [Cp Me4 ][TePh 3 ] (2), and [Cp*][TePh 3 ] (3), respectively. Similarly, reaction of Ph 3 SeCl with LiCp and KCp* furnishes [Cp][SePh 3 ] (4) and [Cp*][SePh 3 ] ( 5). Each was characterized by X-ray crystallography, revealing similar η 5coordination with little distortion from an idealized half-sandwich geometry, presumably from the remaining lone pair on tellurium and selenium. The Te−centroid distances are relatively long (1: 2.770(3), 2: 2.746(1), and 3: 2.733(1) Å), suggesting a mostly ionic interaction. Se−centroid distances (4: 2.748(3), 5: 2.707(2), 2.730(2) Å) were found to be surprisingly similar despite its smaller atomic radius. Compounds 2, 3, and 5 display rapid decomposition at room temperature, extruding a phenylated cyclopentadiene and the respective diphenylchalcogenide. The nature of bonding within these complexes was investigated through DFT methods and found to be primarily ionic in nature.

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Section: Results and Discussionsupporting

confidence: 86%

Late to the Party: Synthesis and Characterization of Tellurium and Selenium Half-Sandwich Complexes

et al. 2021

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“…Triphenyltellurium chloride Ph 3 TeCl crystallizes in the monoclinic space group P2 1 /c [52,53]. The asymmetric unit contains two non-equivalent Ph 3 TeCl molecules.…”

Section: Resultsmentioning

confidence: 99%

High-field solid-state 35Cl NMR in selenium(IV) and tellurium(IV) hexachlorides

2016

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We report solid-state 35 Cl NMR spectra in three hexachlorides, (NH 4 ) 2 SeCl 6 , (NH 4 ) 2 TeCl 6 and Rb 2 TeCl 6 .The C Q ( 35 Cl) quadrupole coupling constants in the three compounds were found to be 41.4±0.1 MHz, 30.3±0.1 MHz and 30.3±0.1 MHz, respectively, some of the largest C Q ( 35 Cl) quadrupole coupling constants ever measured in polycrystalline powdered solids directly via 35 Cl NMR spectroscopy. The 35 Cl EFG tensors are axial in all three cases reflecting the C 4v point group symmetry of the chlorine sites. 35 Cl NMR experiments in these compounds were only made possible by employing the WURST-QCPMG pulse sequence in the ultrahigh magnetic field of 21.1 T. 35 Cl NMR results agree with the earlier reported 35 Cl NQR values and with the complementary plane-wave DFT calculations. The origin of the very large C Q ( 35 Cl) quadrupole coupling constants in these and other main-group chlorides lies in the covalent-type chlorine bonding. The ionic bonding in the ionic chlorides results in significantly reduced C Q ( 35 Cl) values as illustrated with triphenyltellurium chloride Ph 3 TeCl. The high sensitivity of 35 Cl NMR to the chlorine coordination environment is demonstrated using tetrachlorohydroxotellurate hydrate K[TeCl 4 (OH)]⋅0.5H 2 O as an example. 125 Te MAS NMR experiments were performed for tellurium compounds to support 35 Cl NMR findings.

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