Complexes of Tellurium Dichloride, Dibromide and Diiodide with Thiourea and Tetramethylselenourea, TeL2X2. X-Ray Crystal Structures.

Foss, Olav; Maartmann-Moe, Knut; Marøy, Kjartan; Moberg, Tore; Niinistö, Lauri

doi:10.3891/acta.chem.scand.41a-0121

Cited by 27 publications

(28 citation statements)

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“…Solutions containing 1 or 2 with fewer than 2 equiv. 7 do not give separate 31 Se decrease with increasing amounts of the electrophile 7. The changes in the 77 Se NMR resonances of 1 and 2 [18,19] upon coordination with 7 (deshielding coordination shifts) are much larger than those of the 31 P NMR signals (Table 1).…”

Section: Nmr Spectroscopic Investigation Of Binuclear Complexes 8 Andmentioning

confidence: 99%

“…7 do not give separate 31 Se decrease with increasing amounts of the electrophile 7. The changes in the 77 Se NMR resonances of 1 and 2 [18,19] upon coordination with 7 (deshielding coordination shifts) are much larger than those of the 31 P NMR signals (Table 1). The 77 Se NMR resonances of 8 and 9 appear as (pseudo) doublets [X-parts of AAЈX systems] [18][19][20] due to J77 Se, 31 P , but they do not exhibit satellites from coupling with 125 Te.…”

Section: Nmr Spectroscopic Investigation Of Binuclear Complexes 8 Andmentioning

confidence: 99%

“…I 2 also led to precipitation of the 1:2 product 6; however, from CH 2 Cl 2 solutions containing 1:1 mixtures of dppm-diselenide 1 with iodine, precipitation did not occur. The 31 P NMR spectrum of this solution shows only one resonance with a 77 Se, 31 P satellite coupling that is smaller than that of the starting material. The 31 P NMR singlet may be due to a symmetric bonding mode of 1 with iodine, or, alternatively, to a rapid equilibration of coordinated and noncoordinated PSe functions (that is, signal averaging).…”

Section: Introductionmentioning

confidence: 99%

“…Compound 10 was also isolated in small yield from reaction mixtures that were intended to produce a 1:1 complex of 1 with 7. The 31 P NMR spectra of the 1:1 complexes of 1 and 2 with MesTeI show 1 J77 Se, 31 P coupling constants between those of 1,2 and 8,9 (Table 1). Compound 10 was also accessible by addition of elemental tellurium and iodine to dissolved 1 (Scheme 3).…”

Section: Introductionmentioning

confidence: 99%

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Complexes of Bidentate Phosphane Selenide Ligands with Mesitylenetellurenyl Iodide and with Tellurium Diiodide

et al. 2006

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Keywords: Phosphane selenides / Tellurium iodides / Heteronuclear NMR / Raman spectroscopy / Soft-soft interactions Bis(diphenylphosphanyl)methane diselenide (dppmSe 2 , 1) and bis(diphenylphosphanyl)ethane diselenide (dppeSe 2 , 2) reacted with 2 equiv. Br 2 or I 2 to form the insoluble solid products, dppm(SeX 2 ) 2 (X = Br, 3; X = I, 4) and dppe(SeX 2 ) 2 (X = Br, 5; X = I, 6). However, using the iodine-like electrophile mesitylenetellurenyl iodide (MesTeI, 7), fairly soluble complexes, dppmSe 2 [Te(I)Mes] 2 (8) and dppeSe 2 [Te(I)Mes] 2 (9), were obtained. Complexes 8 and 9 contain two T-shaped (10-Te-3) Se-Te(Mes)-I moieties bridged by dppm or dppe; solid 9 exhibits intermolecular soft-soft interactions between approximately linear Se-Te-I units. In a side reaction accompanying the crystallisation of complex 8, or by the reac-

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Section: Nmr Spectroscopic Investigation Of Binuclear Complexes 8 Andmentioning

confidence: 99%

Section: Nmr Spectroscopic Investigation Of Binuclear Complexes 8 Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Complexes of Bidentate Phosphane Selenide Ligands with Mesitylenetellurenyl Iodide and with Tellurium Diiodide

et al. 2006

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“…Displacement ellipsoids are drawn at the 50% probability level. Allen, Kennard et al, 1987) and the estimated length of a C--Se bond in tetramethyl selenourea [1.863(4),~,; Foss & Maartmann-Moe, 1987]. The C(4)--S bond length [1.681 (6) in A, 1.682 (6),~ in B] is almost the same as the C--S bond length in thioureas (1.68 ~,; Allen, Kennard et al, 1987).…”

Section: Ph Phmentioning

confidence: 71%

3,5-Diphenyl-2-(2-pyridylamino)-1-thia-6,6aλ4-diselenapentalene

Billing¹,

Levendis²,

Reid³

et al. 1995

Acta Crystallogr C

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Syntheses and Structures of Four New Tellurium(II) Complexes

Husebye

Törnroos

Zhu

2001

Z. anorg. allg. Chem.

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The four Te II complexes, cis-[TeCl 2 {( i PrNH) 2 CS} 2 ] (1), cis-[TeCl 2 {( i BuNH) 2 CS} 2 ] (2), trans-[TeCl 2 {(PhNMe) 2 CS} 2 ] (3), and trans-[TeCl 2 {(Et 2 N) 2 CS} 2 ] (4), have been synthesised and their molecular structures solved by means of X-ray crystallography. All four complexes are square planar, those with disubstituted thiourea ligands have a cis configuration, those with tetrasubstituted thioureas have a trans configuration. The Te±S bond lengths in 1 and 2 average 2.4994 and 2.5213 A Ê , respectively. The Te±Cl bonds trans to the Te±S bonds have average lengths of 2.8754 and 2.8334 A Ê , reflecting the trans influence of the two disubstituted thioureas. In 3 and 4 with identical ligands trans to each other, the average Te±S and Te±Cl bond lengths are 2.6834 and 2.5964 A Ê , respectively. Cis-trans-Isomerie in quadratisch-planaren [TeCl 2 (stu) 2 ]-Komplexen mit substituierten, volumino È sen Thioharnstoff(stu)-Liganden. Synthesen und Strukturen von vier neuen Tellur(II)-Komplexen Inhaltsu È bersicht. Die vier Te II -Komplexe cis-[TeCl 2 -{( i PrNH) 2 CS} 2 ] (1), cis-[TeCl 2 {( i BuNH) 2 CS} 2 ] (2), trans-[TeCl 2 ((PhNMe) 2 CS} 2 ] (3) und trans-[TeCl 2 {(Et 2 N) 2 CS} 2 ] (4) wurden synthetisiert und ihre Strukturen durch Ro È ntgenkristallstrukturanalysen bestimmt. Die vier Komplexe sind quadratisch-planar, wobei die mit disubstituierten Thioharnstoffliganden eine cis-Konfiguration und die vierfachsubstituierten eine trans-Konfiguration haben. Die Bindungsla Èn-gen Te±S in 1 bzw. 2 betragen im Mittel 2,4994 bzw. 2,5213 A Ê . Die Te±Cl-Bindungen in trans-Stellung zu den Te±S-Bindungen betragen im Mittel 2,8754 bzw. 2,8334 A Ê , was den trans-Einfluû der zwei disubstituierten Thioharnstoffeinheiten widerspiegelt. In 3 und 4 mit identischen Liganden in trans-Stellung zueinander betragen die mittleren Bindungsla È ngen Te±S bzw. Te±Cl 2,6834 bzw. 2,5964 A Ê .

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Complexes of Tellurium Dichloride, Dibromide and Diiodide with Thiourea and Tetramethylselenourea, TeL2X2. X-Ray Crystal Structures.

Cited by 27 publications

References 0 publications

Complexes of Bidentate Phosphane Selenide Ligands with Mesitylenetellurenyl Iodide and with Tellurium Diiodide

Complexes of Bidentate Phosphane Selenide Ligands with Mesitylenetellurenyl Iodide and with Tellurium Diiodide

3,5-Diphenyl-2-(2-pyridylamino)-1-thia-6,6aλ4-diselenapentalene

Syntheses and Structures of Four New Tellurium(II) Complexes

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