Hexaammine-cobalt(III) pertechnetate: preparation, structure and solubility

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 311; no. 1; pp. 775 - 778
• Main Authors: Poineau, Frederic, Mausolf, Edward, Kerlin, William, Czerwinski, Kenneth
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2017; Springer; Springer Nature B.V
• Subjects: Alloys; Ammonia; Chemistry; Chemistry and Materials Science; Cobalt; Crystals; Diagnostic Radiology; Hadrons; Heavy Ions; Hydrogen; Hydrogen bonding; Inorganic Chemistry; Nuclear Chemistry; Nuclear Physics; Physical Chemistry; Room temperature; Single crystals; Solubility; Waste management; Structure elucidation; Technetium; Solubility
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-016-5052-6

A new pertechnetate salt, [Co(NH
3
)
6
][TcO
4
]
3
·2H
2
O, was prepared from the reaction of NH
4
TcO
4
and [Co(NH
3
)
6
]Cl
3
in water. The [Co(NH
3
)
6
][TcO
4
]
3
·2H
2
O salt was characterized by single crystal X-ray diffraction and its solubility (6.15 × 10
−4
M) was measured in water at room temperature. Diffraction measurements indicate the compound to crystallize in the Monoclinic C space group. In [Co(NH
3
)
6
][TcO
4
]
3
·2H
2
O, the TcO
4
−
(avg. Tc–O = 1.716, 1.716, 1.709 Å) and [Co(NH
3
)
6
]
3+
(avg. Co–N = 1.966 Å) ions are slightly distorted. The supramolecular structure of [Co(NH
3
)
6
][TcO
4
]
3
·2H
2
O consists of [Co(NH
3
)
6
]
3+
and TcO
4
−
layers which are connected through hydrogen bonding.
Graphical abstract