Influence of secondary bonding on the intradimer distance of trichloro(ethane-1,2-diolato-O,O′)tellurate(<scp>IV</scp>)

Sundberg, Markku R.; Uggla, Rolf; Laitalainen, Tarja; Bergman, Jan

doi:10.1039/dt9940003279

Cited by 18 publications

(14 citation statements)

References 12 publications

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“…The proposed formation of AS101 involves b-elimination followed by addition reaction with HTeCl 3 . [30] Concentrated HCl was used as ac hloride atom sourcef or the transformationr eaction. [31] For the formation of compound 13,asimilar mechanism is proposed in Scheme 5.…”

Section: Reactiono Ftellurocystine With H 2 Omentioning

confidence: 99%

“…Ta ble 3s hows that in the molecular structure of 13,t he TeÀ Ob ond length is slightly longer than that in AS101 and AS101 + PPh 4 . [30,38] Similarly,T e ÀCl is also comparedw ith other moieties:A S101 shows slightly longerb ond length because of the chloride atomi nteraction between the two units. [31] The crystal packing indicates significant hydrogen-bonding interactions.…”

Section: Compoundmentioning

confidence: 99%

“…For NMR analysis, compounds 34-38 were dissolved in am ixture of solvents D 2 O + [D 6 ]DMSO (v/v,1 :1). 2.114 2.510(2) AS101 [30] 1.9502.570(1) AS101 + PPh 4 [38] 1.9462.536(1)…”

Section: Synthesis Of L-organotellurolate (13) [Tecl 3 Ch 2 Ch(nh 3 )mentioning

confidence: 99%

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Reactivity of Selenocystine and Tellurocystine: Structure and Antioxidant Activity of the Derivatives

Satheeshkumar

Raju

Singh

et al. 2018

Chemistry A European J

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l-Selenocystine (5) and l-tellurocystine (6) have been prepared and the reactivity of these amino acids, i.e., oxidation of 5 and 6, has been performed at various pH values. Hydrogen peroxide was used as an oxidant and it was treated with 5 and 6 in excess in acidic and basic media. Compound 5, upon oxidation, afforded Se and Se products. Selenocysteic acid [HO SeCH CH(NH )COOH] 9, a novel Se compound, was isolated and characterised by single-crystal X-ray diffraction studies. In contrast, l-tellurocystine, upon oxidation with H O , afforded Te and Te products. Zwitterionic organotellurolate(IV), [TeCl CH CH(NH )COOH] 13, was isolated and characterised by NMR and IR spectroscopy, mass spectrometry and elemental analysis. Compound 13 crystallizes in an orthorhombic space group. l-Tellurocystine, when reduced with NaBH , produced the desired tellurolate intermediate, which was trapped with bromoacetic acid. Furthermore, l- and d-tellurocysteine derivatives, [(RTeCH CH(NH )COOH) R=phenyl, substituted phenyl and naphthyl (24-39)] were synthesised and evaluated for their glutathione peroxidase (GPx)-like activities. The results show that l-tellurocysteine derivatives have higher activity than their D-tellurocysteine analogues. DFT calculations for l-tellurocysteine derivatives provided information about the bond lengths and bond angles. This study reveals that the introduction of naphthyl substituents (35-38) leads to twisted conformation of the amino acid derivatives.

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Section: Reactiono Ftellurocystine With H 2 Omentioning

confidence: 99%

Section: Compoundmentioning

confidence: 99%

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Reactivity of Selenocystine and Tellurocystine: Structure and Antioxidant Activity of the Derivatives

Satheeshkumar

Raju

Singh

et al. 2018

Chemistry A European J

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“…For general background and synthesis, see: Petragnani & Stefani (2007); Borisov et al (2013). For related compounds, see: Singh et al (1990); Sundberg et al (1994); Zukerman-Schpector et al (2000); Kandasamy et al (2003); Raghavendra et al (2006);Dutton et al (2009); Lee et al (2010); Rakesh et al (2012). Symmetry codes: (i) Àx; Ày þ 2; Àz þ 1; (ii) x; Ày þ 3 2 ; z À 1 2 ; (iii) x; Ày þ 1 2 ; z À 1 2 ; (iv) Àx þ 1; y À 1 2 ; Àz þ 1 2 .…”

Section: Related Literaturementioning

confidence: 99%

Crystal structure ofrac-(3aR,9aS)-4,4,4-trichloro-1,2,3,3a,4,9a-hexahydro-4λ⁵,9λ⁴-cyclopenta[4,5][1,3]tellurazolo[3,2-a]pyridine

Аскеров¹,

Lukiyanova²,

Мацулевич³

et al. 2015

Acta Cryst E

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The title compound, C10H12Cl3NTe, crystallizes with two crystallographically independent molecules (A and B) in the asymmetric unit. In each case, the coordination around the Te atom is distorted square-pyramidal, with the equatorial plane composed of the three Cl atoms and the C atom of the pyridinium ring. The Te atom is displaced from the mean-square plane by 0.1926 (7) and 0.1981 (8) Å, in molecules A and B, respectivly, away from the apical C atom. The bond lengths from the Te atom to the two Cl atoms arranged trans to each other [2.5009 (7)/2.5145 (7) and 2.5184 (7)/2.5220 (8) Å in molecules A and B, respectivly] are substantially shorter than the third Te—Cl distance [2.8786 (7) and 2.8763 (7) Å in molecules A and B, respectivly]. The 1,3-tellurazole ring is almost planar (r.m.s. deviations of 0.042 and 0.045 Å in molecules A and B, respectivly). The cyclopentane rings in both molecules A and B adopt envelope conformations with the carbon atom opposed to the (Te)C—C(N) bond as the flap. In the crystal, molecules form centrosymmetric 2 + 2 associates via Te⋯Cl interactions [3.3993 (7) and 3.2030 (7) Å]. As a result of these secondary interactions, the Te atom attains a strongly distorted 5 + 1 octahedral environment. Further, the 2 + 2 associates are bound by weak C—H⋯Cl hydrogen bonds into a three–dimensional framework.

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“…As for the ligands, the crystal structure for 24, which is described in this paper, and for AS101 the data deposited in the Crystal Structure Database under the reference code PORSOE [29], were used. To verify and check the docking procedure, we first applied the protocol to the experimentally known complex (1GMY).…”

Section: Docking Studiesmentioning

confidence: 99%

Revisiting the addition reaction of TeCl4 to alkynes: The crystal structure and docking studies of 1-chloro-2-trichlorotelluro-3-phenyl-propen-2-ol

Cunha

Zukerman-Schpector

Caracelli

et al. 2006

Journal of Organometallic Chemistry

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Influence of secondary bonding on the intradimer distance of trichloro(ethane-1,2-diolato-O,O′)tellurate(IV)

Cited by 18 publications

References 12 publications

Reactivity of Selenocystine and Tellurocystine: Structure and Antioxidant Activity of the Derivatives

Reactivity of Selenocystine and Tellurocystine: Structure and Antioxidant Activity of the Derivatives

Crystal structure ofrac-(3aR,9aS)-4,4,4-trichloro-1,2,3,3a,4,9a-hexahydro-4λ⁵,9λ⁴-cyclopenta[4,5][1,3]tellurazolo[3,2-a]pyridine

Revisiting the addition reaction of TeCl4 to alkynes: The crystal structure and docking studies of 1-chloro-2-trichlorotelluro-3-phenyl-propen-2-ol

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Influence of secondary bonding on the intradimer distance of trichloro(ethane-1,2-diolato-O,O′)tellurate(IV)

Cited by 18 publications

References 12 publications

Reactivity of Selenocystine and Tellurocystine: Structure and Antioxidant Activity of the Derivatives

Reactivity of Selenocystine and Tellurocystine: Structure and Antioxidant Activity of the Derivatives

Crystal structure ofrac-(3aR*,9aS*)-4,4,4-trichloro-1,2,3,3a,4,9a-hexahydro-4λ5,9λ4-cyclopenta[4,5][1,3]tellurazolo[3,2-a]pyridine

Revisiting the addition reaction of TeCl4 to alkynes: The crystal structure and docking studies of 1-chloro-2-trichlorotelluro-3-phenyl-propen-2-ol

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Crystal structure ofrac-(3aR,9aS)-4,4,4-trichloro-1,2,3,3a,4,9a-hexahydro-4λ⁵,9λ⁴-cyclopenta[4,5][1,3]tellurazolo[3,2-a]pyridine