Theoretical analysis of TcO3(OH), TcS3(OH) and TcSe3(OH)

Büyükmumcu, Zeki

doi:10.1007/s10967-016-4971-6

Cited by 2 publications

(2 citation statements)

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“…The structure of solid “pertechnic acid” has been debated in the literature over the years but has generally shown the presence of both TcO 4 and TcO 6 units. , Again, this is analogous to multiple reported coordinations in solid “perrhenic acid”, as HReO 4 ·H 2 O (tetrahedral only) and Re 2 O 7 (OH 2 ) 2 (tetrahedral and octahedral) . It should be noted that solid Re 2 O 7 consists of polymerized ReO 4 and ReO 6 units, whereas Tc 2 O 7 and Mn 2 O 7 are dimeric molecular MO 4 only. , HReO 4 has been identified as an isolated gaseous molecule, and an analogous technetium species (“HTcO 4 ”) has been calculated but written as TcO 3 (OH) , to emphasize the TcO 3 + unit; both Re and Tc here are tetrahedrally coordinated.…”

Section: Discussionmentioning

confidence: 97%

“…35 It should be noted that solid Re 2 O 7 consists of polymerized ReO 4 and ReO 6 units, 36 whereas Tc 2 O 7 and Mn 2 O 7 are dimeric molecular MO 4 only. 37,38 HReO 4 has been identified as an isolated gaseous molecule, 39 and an analogous technetium species ("HTcO 4 ") has been calculated but written as TcO 3 (OH) 40,41 to emphasize the TcO 3 + unit; both Re and Tc here are tetrahedrally coordinated.…”

Section: Inorganic Chemistrymentioning

confidence: 99%

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Properties of Pertechnic Acid

et al. 2019

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Dilute aqueous pertechnic acid has long been known as strong monoprotic acid that behaves as a simple pertechnetate ion in aqueous solution. As pertechnic acid concentrates by evaporation, it becomes yellow and then dark red, and dark-red crystalline material may ultimately be obtained. We show that as pertechnic acid concentrates, at least three compounds are formed: a yellow viscous liquid, a colorless (not red) crystalline solid, and a small amount of an intensely colored red–purple compound. The colorless crystalline compound melts at 118 °C and can be melted and recrystallized several times with little decomposition. The red–purple compound is apparently not stable at room temperature and quickly decomposes if it is isolated. UV–vis spectra show that Beer’s law does not hold as pertechnic acid concentrates by evaporation. We report densities, 99Tc nuclear magnetic resonance spectra, and ultraviolet–visible absorption spectra for highly pure aqueous pertechnic acid (accompanied by the other technetium compounds that form) ranging from 1 to 14 M in technetium concentration.

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