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- W2056849580 abstract "A 205Tl NMR study to probe the solution structure and dynamics of a series of thallium-containing metal complexes has been conducted. The following compounds were examined: Tl{Co(CO)4}3 (Ia), [BnMe3N]3[Tl{Fe(CO)4}3] ([BnMe3N]3[Ib]), Tl{M(CO)3Cp}3 (Ic, M = Cr; Id, M = Mo; Ie, M = W), TlFp3 (If; Fp = CpFe(CO)2), [PPN]2[Tl2Fe6(CO)24] ([PPN]2[II]), [Et4N]2[Tl2Fe4(CO)16] ([Et4N]2[III]), [Et4N][L2Tl{Fe(CO)4}2] ([Et4N][IV]: [IVa]-, L2 = bipy; [IVb]-, L2 = en; [IVc]-, L2 = phen; [IVd]-, L2 = tmeda; [IVe]-, L2 = dien), [Et4N]4[Tl4Fe8(CO)30] ([Et4N]4[V]), and TlCo(CO)4 (VI). The 205Tl NMR technique was used to probe the dynamic behavior of the Tl−metal cluster complexes [II]2-, [III]2-, and [V]4- in solution and the formation of Lewis base adducts of [III]-, as well as the possibility of formation of carbonylate anion adducts of Ia, Ic, Id, and If. [IVb]- reacted with acetone and formed, after fortuitous oxidation, [{(CO)4FeL2‘Tl}2Fe(CO)4] (L2‘ = Me2CNCH2CH2NCMe2) (VII). The initially formed complex [L2‘Tl{Fe(CO)4}2]- ([Et4N][IVf]) was spectroscopically characterized. Additionally, the two known but structurally uncharacterized complexes Ia and If as well as the new complexes [BnMe3N]3[Ib] and VII were characterized by single-crystal X-ray diffraction. Compound Ia crystallizes in the monoclinic space group P21/n with a = 16.855(3) Å, b = 6.7790(10) Å, c = 19.049(4) Å, β = 113.84(3)°, V = 1990.8(6) Å3, Z = 4, R1(F) = 0.0221, and wR2(F2) = 0.0542 [I > 2σ(I)]. Compound If was synthesized from K[Fp] and TlCl3·4H2O and crystallizes in the triclinic space group P1̄ with a = 10.789(2) Å, b = 14.239(3) Å, c = 16.703(3) Å, α = 69.39(3)°, β = 89.50(3)°, γ = 69.07(3)°, V = 2223.1(7) Å3, Z = 4, R1(F) = 0.0350, and wR2(F2) = 0.0877 [I > 2σ(I)]. Compound [BnMe3N]3[Ib] was synthesized from Na2Fe(CO)4·3/2diox and Tl(OAc)3 in MeCN and crystallizes in the hexagonal space group P63/m with a = 18.290(3) Å, c = 8.479(2) Å, V = 2456.4(8) Å3, Z = 2, R1(F) = 0.0235, and wR2(F2) = 0.0494 [I > 2σ(I)]. Compound VII crystallizes in the triclinic space group P1̄ with a = 13.597(3) Å, b = 15.040(3) Å, c = 10.536(2) Å, α = 92.75(3)°, β = 95.07(3)°, γ = 114.40(3)°, V = 1946.0(7) Å3, Z = 2, R1(F) = 0.0461, and wR2(F2) = 0.1295 [I > 2σ(I)]." @default.
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- W2056849580 date "1997-07-01" @default.
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- W2056849580 title "Solution Dynamics of Thallium−Metal Carbonyl Compounds Using<sup>205</sup>Tl NMR Spectroscopy" @default.
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