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Bis(tetraphenylarsonium) hexafluoridotechnetate(IV) dihydrate: preparation, structure and spectroscopic analysis
Author(s) -
Balasekaran Samundeeswari Mariappan,
Poineau Frederic
Publication year - 2019
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229619014724
Subject(s) - triclinic crystal system , chemistry , salt (chemistry) , crystallography , octahedron , context (archaeology) , metathesis , crystal structure , fluoride , ion , bond length , inorganic chemistry , organic chemistry , polymerization , biology , polymer , paleontology
Reports of quadrivalent transition‐metal fluoride salts containing bulky organic cations are limited. In this context, we prepared the bis(tetraphenylarsonium) hexafluoridotechnetate(IV) dihydrate salt, (C 24 H 20 As) 2 [TcF 6 ]·2H 2 O, by a cation metathesis reaction of (NH 4 ) 2 [TcF 6 ] in water. This is the first report of an arsonium salt of the hexafluoridotechnetate(IV) dianion. (AsPh 4 ) 2 [TcF 6 ]·2H 2 O crystallizes in the triclinic space group P . The [TcF 6 ] 2− anion adopts a slightly distorted octahedral geometry with an average Tc—F bond length of 1.933 Å. The cyclic voltammogram of (AsPh 4 ) 2 [TcF 6 ]·2H 2 O in CH 3 CN shows a one‐electron reversible oxidation wave at 1.496 V.