First Measurement of a Thermochemical Property of a Seaborgium Compound

Türler, Α.; Brüchle, W.; Dressler, R.; Eichler, Β.; Eichler, Robert; Gäggeler, H. W.; Gärtner, Michael; Glatz, Jean-P.; Gregorich, Κ. Ε.; Hübener, S.; Jost, D.T.; Lebedev, V. Ya.; Pershina, V.; Schädel, M.; Taut, Steffen; Timokhin, S. N.; Trautmann, Ν.; Vahle, A.; Yakushev, A.

doi:10.1002/(sici)1521-3773(19990802)38:15<2212::aid-anie2212>3.0.co;2-6

Cited by 56 publications

(35 citation statements)

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“…For on-line gaschromatographic studies of Sg as volatile SgO 2 Cl 2 compound the OLGA III system in conjunction with the ROMA detection system and the Sg synthesis reaction 22 Ne + 248 Cm was employed (see Figure 3) [44,45]. Typically, the reaction products recoiling from the target were transported to the OLGA III set-up with the aid of a C-aerosol gas-jet.…”

Section: Oxychlorides Of Seaborgiummentioning

confidence: 99%

Chemical studies of elements with Z⩾ 104 in gas phase

2015

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Section: Oxychlorides Of Seaborgiummentioning

confidence: 99%

Chemical studies of elements with Z⩾ 104 in gas phase

2015

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“…Since the 1960's several successful experiments with elements Rf, Db, Sg, Bh, Hs, and Cn have been performed [4][5][6][7][8][9][10][11][12][13][14]. The given references represent an important subset of all available experiments on the chemistry of these elements.…”

Section: Introductionmentioning

confidence: 99%

Gas chromatography of indium in macroscopic and carrier-free amounts using quartz and gold as stationary phases

Serov

Eichler²,

Dressler

et al. 2011

Radiochimica Acta

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Summary. The chemical investigation of E113 is likely to become soon feasible. The determination of chemical properties of carrier-free amounts of the lighter homologues of element 113, especially indium and thallium, allows designing experimental set-ups and selecting experimental conditions suitable for performing these studies. Here, we present investigations of the interaction of indium species with quartz and gold surfaces. Deposition temperatures as well as enthalpies of adsorption were determined for indium T dep = 739 ± 20• C (−∆H ads (In) = 227 ± 10 kJ mol −1 ) and for indium hydroxide T dep = 250 ± 20• C (−∆H ads (InOH) = 124 ± 10 kJ mol −1 ) respectively, on quartz. In case of adsorption of indium on a gold surface only a lower limit of the deposition temperature was established T dep > 980• C (−∆H ads (In) ≥ 315 ± 10 kJ mol −1 ). Investigations of macroscopic amounts of indium in thermosublimation experiments at similar experimental conditions were instrumental to establish a tentative speciation of the observed indium species.

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“…Seaborgium chemistry experiments in the aqueous phase and in the gas phase were carried out at the GSI, Darmstadt, [42,[59][60][61][62] by using 265 Sg synthesized in the 22 Ne + 248 Cm reaction. Today we know that 265 Sg [63] has two states with half-lives of about 9 and 16 s, respectively.…”

Section: (A) Rutherfordium (Rf Element 104)mentioning

confidence: 99%

“…Sg is expected to be very refractory in the elemental state [61] but to form volatile halides, oxide halides, oxide hydroxides and carbonyls [66,67]. The formation and volatility of SgO 2 Cl 2 and SgO 2 (OH) 2 were successfully studied in isothermal gas-adsorption chromatography experiments [42,61,62].…”

Section: (A) Rutherfordium (Rf Element 104)mentioning

confidence: 99%

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Chemistry of the superheavy elements

Schädel

2015

Phil. Trans. R. Soc. A.

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One contribution of 18 to a discussion meeting issue 'The new chemistry of the elements' . Darmstadt, GermanyThe quest for superheavy elements (SHEs) is driven by the desire to find and explore one of the extreme limits of existence of matter. These elements exist solely due to their nuclear shell stabilization. All 15 presently 'known' SHEs (11 are officially 'discovered' and named) up to element 118 are short-lived and are manmade atom-at-a-time in heavy ion induced nuclear reactions. They are identical to the transactinide elements located in the seventh period of the periodic table beginning with rutherfordium (element 104), dubnium (element 105) and seaborgium (element 106) in groups 4, 5 and 6, respectively. Their chemical properties are often surprising and unexpected from simple extrapolations. After hassium (element 108), chemistry has now reached copernicium (element 112) and flerovium (element 114). For the later ones, the focus is on questions of their metallic or possibly noble gas-like character originating from interplay of most pronounced relativistic effects and electronshell effects. SHEs provide unique opportunities to get insights into the influence of strong relativistic effects on the atomic electrons and to probe 'relativistically' influenced chemical properties and the architecture of the periodic table at its farthest reach. In addition, they establish a test bench to challenge the validity and predictive power of modern fully relativistic quantum chemical models.

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First Measurement of a Thermochemical Property of a Seaborgium Compound

Abstract: With only a few atoms of seaborgium (Sg, element 106), in the form of volatile SgO(2)Cl(2), it was possible to determine the sublimation enthalpy of this compound using gas chromatography. Furthermore, it was demonstrated that in Group 6 Sg is chemically more similar to W than to Mo.

Cited by 56 publications

References 6 publications

Chemical studies of elements with Z⩾ 104 in gas phase

Chemical studies of elements with Z⩾ 104 in gas phase

Gas chromatography of indium in macroscopic and carrier-free amounts using quartz and gold as stationary phases

Chemistry of the superheavy elements

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