Steps towards [(C5Me5)TcO3]: Novel synthesis of [(C5Me5)Tc(CO)3] from [{Tc(μ3−OH)(CO)3}4] and oxidation of [(C5Me5)M(CO)3] (M = Tc, Re) with Br2
摘要:
[NEt4](2)[Tc(Cl)(3)(CO)(3)] was prepared directly from [NBu4][TcO4]. Dissolution of [NEt4](2)[Tc(Cl)(3)(CO)(3)] in water yielded the aqua ion [Tc(OH2)(3)(CO)(3)](+) which, upon titration with 1 eq. of OH-, gave the tetranuclear complex [{Tc(mu(3)-OH)(CO)(3)}(4)] in quantitative yield and of which the structure could be elucidated. Reaction of [{Tc(mu(3)-OH)(CO)(3)}(4)] with HC5Me5 gave the important starting material [(C5Me5)M(CO)(3)] (M = Tc, Re). To achieve complexes in higher oxidation states with the C5Me5- ligand, oxidation was performed with [Br-2] for the rhenium and the corresponding technetium complex. Oxidation in trifluoroacetic acid yielded cis/trans-[(C5Me5)M(Br)(2)(CO)(2)] (M = Tc, Re). Oxidation in dichloromethane gave in both cases the seven co-ordinate, 18e(-) M(III) complex [(C5Me5)MBr(CO)(3)](+). The structure of the rhenium complex was elucidated. It was found that oxidation took place at the metal centre and the C5Me5- ring to yield [(CO)(3)M(mu-Br)(3)M(CO)(3)] as the counterion. (C) 1998 Elsevier Science Ltd. All rights reserved.
作者:Konstantinos Raptis、Ernst Dornberger、Basil Kanellakopulos、Bernhard Nuber、Manfred L. Ziegler
DOI:10.1016/0022-328x(91)80101-o
日期:1991.1
The compounds LTc(CO)3 (L C5Me5, C5Me4Et, Ind) were synthesized for the first time and their structures as well as the well-known (C5Me5)Re(CO)3 were determined by single-crystal X-ray diffraction. The IR, 1H NMR, 13C NMR and the UV spectra are reported and discussed.
首次合成了LTc(CO)3(L C 5 Me 5,C 5 Me 4 Et,Ind)化合物及其结构以及众所周知的(C 5 Me 5)Re(CO)3通过单晶X射线衍射确定。报道并讨论了IR,1 H NMR,13 C NMR和UV光谱。
Syntheses, Structures and Reactivities of [CpTc(CO)
<sub>3</sub>
X]
<sup>+</sup>
and [CpRe(CO)
<sub>3</sub>
X]
<sup>+</sup>
作者:Fabio Zobi、Bernhard Spingler、Roger Alberto
DOI:10.1002/ejic.200800258
日期:2008.9
mixture of cis/trons-[Cp*M III Br 2 (CO)2] isomers [M = Re (cis/trans-4), 99 Tc (cis/trans-4a)] via CO release. In methanol, 3 reacts with the solvent to generate the methoxycarbonyl complex trans-[Cp*Re III (CO)2Br(COOCH3)] (5). Compound 5 is stable under basic conditions. In acidic media it is converted into [Cp*Re I -(CO) 3 ] as the major product. Kinetic studies with 13 C labelled formic acid indicate
我们合成了 [Cp*M III (CO) 3 Br] + 配合物 (M = Re, 99 Tc) 并研究了它们在水中和有机溶剂中的基本化学性质,以了解这些配合物是否可以作为合成子用于制备用于(放射性)药物应用的新型 Re 和 99 Tc 基环戊二烯基核。[Cp*M III (CO) 3 Br]Br [M = Re (1), 99 Tc (1a)] 配合物从相应的 [Cp*MI (CO) 3 ] 与Br 2 在冷甲苯中。化合物 1 和 1a 是光和热不稳定的,在室温下经历快速的、溴化物浓度依赖性氧化还原反应,生成稳定的 [Cp*M III (CO) 3 Br][(CO) 3 MI (μ-Br) 3 MI (CO) 3 ] [M = Re (2), 99 Tc (2a)] 种作为主要产物。1 与 AgSbF 6 的反应产生氧化还原稳定的复合物 [Cp* Re III (CO) 3 -Br]SbF
Metallorganische chemie des technetiums XII. Photolytische CO-substitutionsreaktionen von technetiumtricarbonylverbindungen. Synthesen und Röntgenstrukturanalysen von (C5H5)Tc(CO)3(PPh3), (C5Me5)Tc(CO)2(PPh3) und [HB(3,5-Me2 Pz)3Tc(CO) 2[P(OMe)3] im Vergleich mit seinen Homologen
作者:Jürgen E. Joachim、Christos Apostolidis、Basil Kanellakopulos、Daniel Meyer、Bernhard Nuber、Konstantinos Raptis、Jean Rebizant、Manfred L. Ziegler
DOI:10.1016/0022-328x(94)05270-l
日期:1995.5
phosphorous donor ligands are reported. (C5Me5)Tc(CO)3 and (C5H5)Tc(CO)3 react with triphenylphosphane to yield (C5Me5)Tc(CO)2(PPh3) (3) and (C5H5)Tc(CO)2(PPh3) (4) respectively. 3 and 4 have been isolated and their molecular and crystalstructures were determined by single-crystal X-ray diffraction. The crystalstructures of the yellow compounds 3 (monoclinic) and 4 (triclinic) are discussed together
报道了三羰基tech与中性磷供体配体的光化学反应。(C 5 Me 5)Tc(CO)3和(C 5 H 5)Tc(CO)3与三苯基膦反应生成(C 5 Me 5)Tc(CO)2(PPh 3)(3)和(C 5 H 5)Tc(CO)2(PPh 3)(4)。3和4已分离出它们,并通过单晶X射线衍射确定了它们的分子和晶体结构。讨论了黄色化合物3(单斜晶系)和4(三斜晶系)的晶体结构及其光谱数据,并将其与确定的同源the化合物(C 5 Me 5)Re(CO)2(PPh 3)的结构进行了比较。)(3a)。辐射的HB(3,5-Me 2 C 3 HN 2)Tc(CO)3与亚磷酸三甲酯(TMP)的热原位反应产生HB(3,5-Me 2 C 3 HN 2Tc(CO)2(TMP)(7)。确定了7的晶体和分子结构,并与确定的同质化合物HB(3,5-Me 2 C 3 HN 2)Re(CO)2(TMP)(7a)和HB的结构进行了比较(3,5-Me
Herrmann, Wolfgang A.; Alberto, Roger; Bryan, Jeff C., Chemische Berichte, 1991, vol. 124, p. 1107 - 1112
作者:Herrmann, Wolfgang A.、Alberto, Roger、Bryan, Jeff C.、Sattelberger, Alfred P.
DOI:——
日期:——
Fischer, Ernst Otto; Apostolidis, Christos; Dornberger, Ernst, Zeitschrift fur Naturforschung, B: Chemical Sciences, 1995, vol. 50, # 9, p. 1382 - 1395
作者:Fischer, Ernst Otto、Apostolidis, Christos、Dornberger, Ernst、Filippou, Alexander C.、Kanellakopulos, Basil、et al.