Synthesis and structure of di-µ-oxo nitridotechnetium(<scp>VI</scp>) dimers and a monomeric nitridotechnetium(<scp>V</scp>) mixed-ligand complex

Baldas, John; Boas, John F.; Colmanet, Silvano F.; Williams, Graham J.

doi:10.1039/dt9920002845

Cited by 19 publications

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References 40 publications

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“…One of the better known examples was the reaction with diethyl dithiocarbamates and related ligands in aqueous solution to give complexes [{ 99 TcN(S 2 CNEt 2 )} 2 (µ-O) 2 ]. [27] In contrast to the isoelectronic [Tc=O] 3+ core, which is the best studied structural motif in radiopharmaceutical chemistry, the [ were formed from water in a first step was based on this stability. Succinic dihydrazide was the nitrido source and SnCl 2 the reducing agent.…”

Section: Hydrated Coordination Compoundsmentioning

confidence: 99%

The Chemistry of Technetium–Water Complexes within the Manganese Triad: Challenges and Perspectives

Alberto

2008

Eur J Inorg Chem

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The chemistry of technetium is essentially driven by radiopharmaceutical applications. These comprise the syntheses of novel complexes but, moreover, the combination of targeting biomolecules with metal complexes. Aqua ions are especially convenient for facilitatating the introduction of metal cations into biomolecules, but are nonexistent for Tc and Re in the Mn triad. This microreview will discuss the chemistry of those Tc complexes that contain H2O as ligands. Special attention will be payed to organometallic aqua ions, i.e. complexes that are typically organometallic with water as ligand. Of particular interest is the coordination chemistry of [M(OH2)3(CO)3]+ (M = Mn, Tc, Re) complexes in water since it is the origin of the widely applied radiopharmaceutical research with 99mTc and 188Re. The chemistry of organometallic aqua ions is not confined to Werner‐type ligands, hence, a further emphasis will be placed on pure organometallic chemistry in water.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

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Section: Hydrated Coordination Compoundsmentioning

confidence: 99%

The Chemistry of Technetium–Water Complexes within the Manganese Triad: Challenges and Perspectives

Alberto

2008

Eur J Inorg Chem

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“…The nitrido Ugand (N^") is isoelectronic with the 0x0 ligand (O^") and is a powerful nelectron donor which is very effective in stabilising transition metals in high oxidation states. A characteristic feature of the chemistry of Tc^'N is the formation of Stahle monomeric, ^-0x0 and di(/x-oxo) complexes based on the [TcN]^ + , [TcN-0-TcN]'^+ (A) and [TcN(/z-0)2TcN]^+ (B) cores, respectively [1], Gore A has been crystallographically established in the cyclic tetramer (AsPh4)4[Tc4N402(oxalate)6] [2] and core B in [{TcN(S2CNEt2)}2(/^-0)2] [3]. Oxygenbridged nitrido complexes have not been described for any other transition metal.…”

Section: Introductionmentioning

confidence: 99%

“…The yellow bromo complex was similarly prepared from a Solution of 1 in MeS03H and AsPh4Br • HBr/HBr. The IR spectra for 8 (X = Cl, Br) showed two v(TcN) peaks, establishing the syn stereochemistry for both complexes[3]. The asymmetric and Symmetrie bridge oxygen stretches were observed at 711 and 514 cm"' for 8 (X = Cl) and 710 and 508 cm~ ^ for 8 (X = Br).…”

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confidence: 97%

“…A most useful aspect of di(;/-0x0) cleavage is that synthetic intermediates such as [Tc^'N(S2CNEt2)Cl2] can be prepared which may then be used to prepare mixed-ligand Tc^N complexes such as AsPh4[TcN(S2CNEt2)(SC0C0S)] in a controlled fashion. Also, species such as [Tc"N(CN)2Cl2]~ and [TcN(CN)Cl3]~, which are not accessible by the reaction of [TcNCU]" with CN " due to reduction to Tc'^N, may be prepared and studied by ESR[3].…”

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confidence: 99%

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Monomer, μ-Oxo Dimer, Di(μ-Oxo) Dimer Interconversion of Nitridotechnetium(VI) Complexes in Solution

Baldas¹,

Boas²,

Colmanet³

et al. 1993

Radiochimica Acta

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Nitrido / Technetium(VI) / Monomer / fi-Oxo dimer / Di(ii-oxo) dimer / Monomer and dimer interconversions SummaryThe interconversion of monomeric and ^-oxo and di(/i-oxo) dimeric nitridotechnetium(VI) species in Solution has been studied by ESR and UV-Vis spectrophotometry. High acidity and the presence of coordinating anions favour the monomeric form. In very weakly coordinating acids the n-oxo and di(ß-oxo) aquanitrido cations have been identified. (AsPh4)2[{TcNX2}2(A'-0)2] (X = Cl, Br) have been prepared and the chloro complex shown to be a useful starting material for the preparation of di{/i-oxo) dimers by substitution.

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“…In Gegenwart von Chloridionen wird dabei bevorzugt [TcNCl 4 ] ± gebildet. Ein alternativer Zugang zu dieser Schlu È sselverbindung besteht in der Spontanentschwefelung von Thionitrosylkomplexen [6] oder in oxidativen Ligandenaustauschreaktionen an Technetium(V)-Nitridokomplexen [7,8].…”

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[Au(Et2dtc)2][TcNCl4] - Darstellung und Struktur

Abram

2000

Z. anorg. allg. Chem.

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[Au(Et2dtc)2][TcNCl4] – Synthesis and Structure [Au(Et2dtc)2][TcNCl4] (Et2dtc– = N,N‐diethyldithiocarbamate) is formed by the reaction of [Au(CO)Cl] with [TcN(Et2dtc)2] in dichloromethane. The solid state structure of the compound is characterized by a large triclinic unit cell (space group, P1, a = 9.422(2), b = 22.594(5), c = 32.153(7) Å, α = 72.64(1), β = 85.19(1), γ = 86.15(1)°, Z = 12) and shows an unusual arrangement due to long‐range contacts between the technetium atoms and sulfur atoms of the [Au(Et2dtc)2]+ units (3.45–3.56 Å) which assemble two anions and one cation to {[TcNCl4][Au(Et2dtc)2] · [TcNCl4]}– moieties.

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Synthesis and structure of di-µ-oxo nitridotechnetium(VI) dimers and a monomeric nitridotechnetium(V) mixed-ligand complex

Cited by 19 publications

References 40 publications

The Chemistry of Technetium–Water Complexes within the Manganese Triad: Challenges and Perspectives

The Chemistry of Technetium–Water Complexes within the Manganese Triad: Challenges and Perspectives

Monomer, μ-Oxo Dimer, Di(μ-Oxo) Dimer Interconversion of Nitridotechnetium(VI) Complexes in Solution

[Au(Et2dtc)2][TcNCl4] - Darstellung und Struktur

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