Cyclization of 3-(arylchalcogeno)propenoyl chlorides. 1. 1,2-Oxatellurol-1-ium halides via ipso acylation

Detty, Michael R.; Murray, Bruce J.; Smith, Douglas L.; Zumbulyadis, Nicholas

doi:10.1021/ja00342a040

Cited by 102 publications

(39 citation statements)

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“…The intermolecular Te...N distances fall within the range 2.640-2.774/~; they are longer than the intramolecular distances (2.020-2.071/~) and are comparable with those found in similar compounds, where the Te and N atoms are involved both in strong and in weak bonds, as well as with those found in other compounds with Te and N atoms not directly linked but only involved in weak bonds. Indeed in 1,2,5-telluradiazole the Te...N intermolecular distance is 2.764 (6)A, with an intramolecular distance of 2.023 (6) A (Bertini, Dapporto, Lucchesini, Sega & De Munno, 1984), and in bis[2-(2-pyridyl)phenyl] tritelluride the distance between non-bonded Te and N atoms is 2.55 (7) (Hauge & Vikane, 1985;Detty, Murray, Smith & Zumbulyadis, 1983;Ahmed, McWinnie & Hamor, 1985). The C--C and C--N bonds show some irregularities but it is not possible to identify a trend similar for all six molecules.…”

Section: Csh7ntementioning

confidence: 99%

Structure of 3,5-dimethyl-1,2-tellurazole

Munno¹,

Lucchesini²

1992

Acta Crystallogr C

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Section: Csh7ntementioning

confidence: 99%

Structure of 3,5-dimethyl-1,2-tellurazole

Munno¹,

Lucchesini²

1992

Acta Crystallogr C

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“…Reagent grade BMA (Merck-Schuchardt) was washed with 4% aqueous NaOH solution stored over anhydrous silica gel and distilled under vacuum before use. DPDT was synthesized in our laboratory according to a procedure described in the literature [22].…”

Section: Methodsmentioning

confidence: 99%

Photopolymerization of n-Butyl Methacrylate in Solutions Initiated by Diphenyl Ditelluride

Srivastava

Tripathi

2008

Designed Monomers and Polymers

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Radical photopolymerization of n-butyl methacrylate (BMA) with diphenyl ditelluride [DPDT] as a photoinitiator has been carried out by visible light excitation at room temperature for 24 h. The system followed non-ideal kinetics, i.e., R p ∝ [DPDT] 2.00 [BMA] 1.75 . The FT-IR spectrum showed a band at 1721 cm −1 due to acrylate C=O Str. The 1 H-NMR spectrum showed a peak at 3.9 δ due to -O-CH 2 -of acrylate. The 13 C-NMR spectrum showed resonance signals at δ 175.55-178.20 ppm due to carbonyl carbon. The presence of tellurium in polymer is confirmed by qualitatively, as well as with ICP-MS. The ESR showed the free radical mode of polymerization and the gyromagnetic constant g has been computed as 2.2203.  Koninklijke Brill NV, Leiden, 2008

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“…乙醚和四氢呋喃经过在金属钠和二苯甲酮存在下回流变蓝后蒸出; 其它市售试剂在使用前未经纯化. 1-氯-2-苯基四甲基二硅烷 [19] , 1-氯-2-对甲氧基苯基四甲基二硅烷 [20] , 对溴苯乙酮缩乙二醇 [21] , 对甲苯磺酸吡啶盐(PPTS) [22] , 4-溴-N,N-二甲基苯胺 [23] , 均参照文献方法合成. [24] .…”

Section: 仪器与试剂unclassified

Interaction of Silicon-Silicon Bonds and Phenyl Rings: UV Absorption Properties of Unsymmetrically Substituted 1,2 Diphenyltetramethyldisilanes

谷广娜¹,

孙怀林²,

周秀中³

2014

Chin. J. Org. Chem.

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The interaction of silicon-silicon-bonds and phenyl-systems in phenyldisilanes and the resulted characteristic UV absorptions have been one of the fundamental issues of organosilicon chemistry. However, the interaction between two phenyl groups and the central silicon-silicon bond in 1,2-diphenyltetramethyldisilanes and its correlation with the characteristic UV absorptions remain uncompletely solved. In this paper, a series of unsymmetric substituted 1,2-diphenyltetramethyldisilanes, namely C 6 H 5 SiMe 2 SiMe 2 C 6 H 4 -p-COMe (3), p-MeOC 6 H 4 SiMe 2 SiMe 2 C 6 H 4 -p-COMe (4), C 6 H 5 SiMe 2 SiMe 2 C 6 H 4 -p-NMe 2 (5) and p-MeOC 6 H 4 SiMe 2 SiMe 2 C 6 H 4 -p-NMe 2 (6), have been synthesized and characterized by 1 H NMR, 13 C NMR, IR and elemental analyses, and their UV absorption properties were studied. It is found that each of the compounds exhibits two characteristic absorption bands at the long wavelength region of the UV spectra, which corresponds to the absorptions produced when individual substituted phenyl groups are linked to silicon-silicon bonds. No obvious bathochromic shifts due to interaction between two substituted phenyl groups through the silicon-silicon bond have been observed. This indicates that the traditional explanation of characteristic UV absorptions of phenyldisilanes in terms of conjugation between silicon-silicon bonds and phenyl groups should be re-examined.

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Cyclization of 3-(arylchalcogeno)propenoyl chlorides. 1. 1,2-Oxatellurol-1-ium halides via ipso acylation

Cited by 102 publications

References 0 publications

Structure of 3,5-dimethyl-1,2-tellurazole

Structure of 3,5-dimethyl-1,2-tellurazole

Photopolymerization of n-Butyl Methacrylate in Solutions Initiated by Diphenyl Ditelluride

Interaction of Silicon-Silicon Bonds and Phenyl Rings: UV Absorption Properties of Unsymmetrically Substituted 1,2 Diphenyltetramethyldisilanes

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