2185-78-6Relevant academic research and scientific papers
Molecular Motion in Solid X, X = Cl, Br, I, PF6, and BF4. 1H, 19F NMR Second Moment and Crystal Structure
Burbach, Guenter,Dou, Shi-Qi,Weiss, Alarich
, p. 1302 - 1309 (2007/10/02)
The tumbling motion of the tetramethylstibonium cation (+) has been studied in the ionic compounds X, X = Cl, Br, I, PF6, and BF4, by measurement of the second moment of the protons M2(1H) in the temperature range 95 I was determined by single crystal X-ray diffraction: a = 728.4(3) pm, c = 1037.7(5) pm, space group C6v4-P63mc, Z = 2. - M2(1H) of I shows cation tumbling at T > 320 K.The methyl groups are rotating about their threefold axes in the whole temperature range studied. - In PF6 and BF4 both, cation and anion are tumbling at T >/= 259 K and T >/= 248 K, respectively, as seen by M2(1H) and M2(19F).A jump in the second moments and differential thermal analysis (DTA) of BF4 reveals a solid-solid phase transition with hysteresis (width 28 K).Activation energies for the tumbling motion of the tetramethylstibonium cation have been determined. - Complex Compounds / Crystal Structure / Molecular Dynamics / Phase Transitions / Spectroscopy, Nuclear Magnetic Resonance
SPALTUNG VON TETRAMETHYLDISTIBAN MIT BROM, IOD UND METHYLIODID. BILDUNG DES ADDUKTS MeSbI2*2Me4SbI
Breunig, Hans Joachim,Jawad, Hussain
, p. 417 - 422 (2007/10/02)
Very pure halides Me2SbX (X - Br, I) are obtained by cleavage reactions of Me2SbSbMe2 with equimolar amount of Br2 or I2.Me3Sb and Me2SbI are formed in the reaction of Me2SbSbMe2 and MeI and a 1/1 molar ratio.With excess MeI the products are: Me4SbI2 and an adduct of composition MeSbI2 * 2Me4SbI, which can also be formed by the reaction of its components.
