Abstract:(NS0)These results have prompted us to investigate the reactions of Sem(SiMe3)2]z and Se, [N(SiMe&], with tellurium halides to obtain tellurium-containing heterocycles with a N=Se=N function.
“…While the structural features and chemical properties of a large number of sulfur−nitrogen compounds are well-understood, − selenium−nitrogen and tellurium−nitrogen chemistry has seen rapid development only during recent years. Reagents such as trimethylsilyl chalcogen diamides, [(Me 3 Si) 2 N] 2 E (E = S, Se), have provided routes for selenium and tellurium-containing chalcogen-nitrogen compounds, for example, 1,5-Se 2 S 2 N 4 , Se 4 N 4 , [(Se 2 SN 2 )Cl] 2 , , X 2 TeSeSN 2 (X = Cl, Br, I), X 2 TeS 2 N 2 (X = Cl, Br), Cl 2 Te 2 SN 2 , and X 6 Te 2 SeN 2 (X = Cl, Br) . Haas et al .…”
Section: Introductionmentioning
confidence: 99%
“…In general, all such complexes are based on one fundamental unit, namely, a five-membered metallacycle containing the [S 3 N] - or [S 2 N 2 ] 2- ligands (or the protonated analogue of the latter, i.e., [S 2 N 2 H] - ). Complexes of [Se 3 N] - , [Se 2 N 2 ] 2- , [SeSN 2 ] 2- , and [TeSN 2 ] − together with the protonated forms of the latter three are all known (Scheme a). 1 …”
The reaction of (Me3SiNSN)2S with TeCl4 in CH2Cl2 affords Cl2TeS2N2 (1) and that of (Me3SiNSN)2Se with TeCl4 produces Cl2TeSeSN2 (2) in good yields. The products were characterized by X-ray crystallography, as well as by NMR and vibrational spectroscopy and EI mass spectrometry. The Raman spectra were assigned by utilizing DFT molecular orbital calculations. The pathway of the formation of five-membered Cl2TeESN2 rings by the reactions of (Me3SiNSN)2E with TeCl4 (E = S, Se) is discussed. The reaction of (Me3SiNSN)2Se with [PPh4]2[Pd2X6] yields [PPh4]2[Pd2(mu-Se2N2S)X4] (X = Cl, 4a; Br, 4b), the first examples of complexes of the (Se2N2S)2- ligand. In both cases, this ligand bridges the two palladium centers through the selenium atoms.
“…While the structural features and chemical properties of a large number of sulfur−nitrogen compounds are well-understood, − selenium−nitrogen and tellurium−nitrogen chemistry has seen rapid development only during recent years. Reagents such as trimethylsilyl chalcogen diamides, [(Me 3 Si) 2 N] 2 E (E = S, Se), have provided routes for selenium and tellurium-containing chalcogen-nitrogen compounds, for example, 1,5-Se 2 S 2 N 4 , Se 4 N 4 , [(Se 2 SN 2 )Cl] 2 , , X 2 TeSeSN 2 (X = Cl, Br, I), X 2 TeS 2 N 2 (X = Cl, Br), Cl 2 Te 2 SN 2 , and X 6 Te 2 SeN 2 (X = Cl, Br) . Haas et al .…”
Section: Introductionmentioning
confidence: 99%
“…In general, all such complexes are based on one fundamental unit, namely, a five-membered metallacycle containing the [S 3 N] - or [S 2 N 2 ] 2- ligands (or the protonated analogue of the latter, i.e., [S 2 N 2 H] - ). Complexes of [Se 3 N] - , [Se 2 N 2 ] 2- , [SeSN 2 ] 2- , and [TeSN 2 ] − together with the protonated forms of the latter three are all known (Scheme a). 1 …”
The reaction of (Me3SiNSN)2S with TeCl4 in CH2Cl2 affords Cl2TeS2N2 (1) and that of (Me3SiNSN)2Se with TeCl4 produces Cl2TeSeSN2 (2) in good yields. The products were characterized by X-ray crystallography, as well as by NMR and vibrational spectroscopy and EI mass spectrometry. The Raman spectra were assigned by utilizing DFT molecular orbital calculations. The pathway of the formation of five-membered Cl2TeESN2 rings by the reactions of (Me3SiNSN)2E with TeCl4 (E = S, Se) is discussed. The reaction of (Me3SiNSN)2Se with [PPh4]2[Pd2X6] yields [PPh4]2[Pd2(mu-Se2N2S)X4] (X = Cl, 4a; Br, 4b), the first examples of complexes of the (Se2N2S)2- ligand. In both cases, this ligand bridges the two palladium centers through the selenium atoms.
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