title: Technetium tetrachloride revisited: a precursor to lower-valent binary technetium chlorides.
abstract: Technetium tetrachloride has been prepared from the reaction of technetium metal with excess chlorine in sealed Pyrex ampules at elevated temperatures. The product was characterized by single-crystal and powder X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and alternating-current magnetic susceptibility. Solid TcCl(4) behaves as a simple paramagnet from room temperature down to 50 K with μ(eff) = 3.76 μ(B). Below 25 K, TcCl(4) exhibits an antiferromagnetic transition with a Néel temperature (T(N)) of ∼24 K. The thermal behavior of TcCl(4) was investigated under vacuum at 450 °C; the compound decomposes stepwise to α-TcCl(3) and TcCl(2).
authors: Department of Chemistry, University of Nevada-Las Vegas, Las Vegas, Nevada 89154, United States. erikvjohnstone@gmail.com
authors: Erik V
authors: EV
authors: Johnstone
authors: Frederic
authors: F
authors: Poineau
authors: Paul M
authors: PM
authors: Forster
authors: Longzou
authors: L
authors: Ma
authors: Thomas
authors: T
authors: Hartmann
authors: Andrew
authors: A
authors: Cornelius
authors: Daniel
authors: D
authors: Antonio
authors: Alfred P
authors: AP
authors: Sattelberger
authors: Kenneth R
authors: KR
authors: Czerwinski