Perfluorophenyl derivatives of the elements XV. Perfluoroaromatic derivatives of sulphur, selenium and tellurium

Cohen, S.C.; Reddy, M.L.N.; Massey, Andrew

doi:10.1016/0022-328x(68)80084-1

Cited by 65 publications

(7 citation statements)

References 7 publications

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“…In order to further demonstrate the generality of this method, we chose the installation of the perfluorophenyl group on tellurium as our next goal. The synthesis of a related compound, Te(C 6 F 5 ) 2 , was reported in 1968 starting from Hg(C 6 F 5 ) 2 and elemental tellurium . Thus, when (pentafluorophenyl)trimethylsilane was reacted with 3b under reaction conditions developed for the CF 2 H transfer, two new compounds could be isolated from the reaction mixture (Scheme ).…”

Section: Synthesismentioning

confidence: 99%

Synthesis and Characterization of Fluorinated Hypervalent Tellurium Derivatives

Pietrasiak

Togni

2017

Organometallics

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The synthesis of tellurium derivatives bearing fluorinated groups, similar in structure to their hypervalent iodine congeners, is reported. Thus, a series of CF 3 , CF 2 H, and C 6 F 5 aryltellurium(II) species bearing various functional groups interacting with the Te atom was obtained. The installation of the various fluorinated groups relies on the use of the corresponding trimethylsilyl precursors. The hypervalent nature of the products is discussed on the basis of their NMR spectroscopic and X-ray crystallographic characterization.

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Section: Synthesismentioning

confidence: 99%

Synthesis and Characterization of Fluorinated Hypervalent Tellurium Derivatives

Pietrasiak

Togni

2017

Organometallics

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“…Bis(pentafluoropheny1)telluride was prepared by heating an equimolar mixture of (C#5)2Hg and tellurium in a sealed, evacuated tube at 225°C for 24 h (16). The corresponding dichlorides and dibromides were prepared by reaction of (C#.J2Te with the elemental halogen in CC4.…”

Section: Methodsmentioning

confidence: 99%

A tellurium-125 Mössbauer study of bis(trifluoromethyl)- and bis(pentafluorophenyl)- tellurides and their dihalides

Jones¹,

Sharma²,

Naumann³

1986

Can. J. Chem.

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. 64,987 (1986).The ' "~e Mossbauer spectra for (CF3)2Te and (C6FS)2Te have been recorded and exhibit significantly larger quadrupole splittings (14.02 and 13.40 mm s-' respectively) than those of Me2Te (10.5 mm s-') and Ph2Te (1 1 .O mm s-I). The dihalides (CF3)2TeX2 and (C6$s)2TeX2 (X = F, C1,Br) have consistently smaller quadrupole splittings than the dihalides Me2Tex2 and Ph2TeX2. These observations are consistent with the greater electronegativity of the CF3 and C6F5 ligands. The l Z 5~e nmr chemical shifts of (C6F5)Te and its dihalides show a consistent trend to more positive values (increased deshielding) as the electronegativity of the ligands attached to tellurium increases ((C&)Te, 297.6 ppm; (C6FS)2TeF2, 1060 ppm). However, for (CF3)2Te and its dihalides a more complex pattern is observed which may be explained by changes in the mean electronic excitation term in the Ramsey paramagnetic shielding term. [Traduit par la revue]

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“…Te -(PhCH,)zTe(CN)2 2 SCHEME 4 Iodobenzene does not react with tellurium, but interaction of iodopolyfluoroarenes and Te at 23&26OoC leads to bis(pentafluoropheny1)telluride 3a (yield is 100%) [23] and bis(2-nonafluorobipheny1)telluride 3b (yield is 35%) [24] (Scheme 5).…”

Section: °C/32hmentioning

confidence: 99%