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Orthotellurated Derivatives of N,N-Dimethylbenzylamine: Crystal and Molecular Structures of tellurium(IV) Tribromide and dimethylammonium Chloride

DOI: 10.1039/DT9900000907

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 907 - 913 (1990)

Update date:2022-08-03

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Authors:

Singh, Harkesh B.Singh, Harkesh B.

Sudha, NarsimhanSudha, Narsimhan

West, Antony A.West, Antony A.

Hamor, Thomas A.Hamor, Thomas A.

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Article abstract of DOI:10.1039/DT9900000907

The reaction of o-lithiobenzylamine with elemental tellurium followed by air oxidation furnished an ill defined 'tellurinic anhydride'.Halogenolysis reactions of this with bromine and sulphonyl chloride afforded the corresponding <2-(dimethylaminomethyl)phenyl>trihalogenotellurium(IV) derivatives.Reduction of the trihalides with excess of hydrazine hydrate gave novel <2-(dimethylaminomethyl)phenyl>halogenotellurium(II) derivatives.Metathesis of the chlorotellurium(IV) and -(II) derivatives with sodium diethyldithiocarbamate resulted in the formation of dithiocarbamato derivatives.The crystal structure of <2-(dimethylaminomethyl)phenyl>tellurium(IV) tribromide is monoclinic, space group P21/n with a = 9.226(6), b = 15.439(8), c = 9.618(5) Angstroem, β = 94.94(5) deg, Z = 4, and R = 0.0419 for 938 observed reflections.The co-ordination about Te approximates to octahedral with a vacant equatorial site: two Br atoms axial, the third Br and the organic ligand equatorial (ax) 2.758(2) and 2.633(3), Te-Br(eq) 2.632(2), Te-C 2.12(1), and Te-N 2.42(1) Angstroem>.The compound is essentially monomeric, with a weak association between Te and a neighbouring bromine atom <3.896(2) Angstroem>. <2-(Butyldichlorotelluro)benzyl>dimethylammonium chloride is monoclinic, space group P21/n with a = 14.278(12), b= 8.349(5), c = 14.480(8) Angstroem, β = 93.59(5) deg, Z = 4, and R = 0.0288, for 2245 observed reflections.The co-ordination about Te can also be considered as octahedral with a vacant equatorial site: two chlorines apical, and the chloride ion and two carbon atoms equatorial .The quaternary nitrogen atom is twistedaway from the tellurium atom, Te...N 4.380(4) Angstroem, forming a hydrogen bond with a chloride ion.

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Product name:<2-(dimethylaminomethyl)phenyl>ethyltellurium(IV) dichloride

Cas No:128543-99-7

128543-99-7

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