Die Kristallstruktur der bei Raumtemperatur stabilen Modifikation des Titantetrabromids

Abstract

Die Kristallstruktur der bei 20°C stabilen Modifikation des TiBr4 wurde röntgenographisch untersucht. Sie ist monoklin, Raumgruppe C 2h5P 21/c, mit den Gitterkonstanten . Die Kristallstruktur ist der des SnBr4 isotyp.

Crystal structure ofSiH4at high pressure

“…3͒. Table I summarizes structural characteristics of known SnBr 4 -type phases in comparison to SiH 4 V. [24][25][26][27][28][29][30] The b / a and c / a ratios of the SiH 4 V structure fall within the margins of the axial ratios of the other SnBr 4 -type structures. The ␤ angle of the monoclinic unit cell takes a value of 102.2°-104.4°for all the observed structures and is virtually pressure independent for the SiH 4 V structure.…”

Inorganic Metal Thiocyanates

“…112 These data thus imply the structure is more similar to TiF 4 , a 1D structure comprising corner-sharing TiF 6 octahedra, 113 rather than the later halides, TiX 4 , X = Cl, Br, I, which are all tetrahedral molecular materials, with no Ti−X−Ti bridges. [114][115][116] There are no reports of Zr(NCS) 4 or Hf(NCS) 4 , though the DMF solvates of both are reported. 117 It is worth noting that one of the few ways to readily separate Zr and Hf is by preparing the thiocyanato oxohydroxy metal complexes, and so it is possible that Zr(NCS) 4 and Hf(NCS) 4 will have different structures and chemistries.…”

A63,65Cu and 127I Nuclear Quadrupole Resonance and X-Ray Crystallographic Study of a Low-Temperature Phase of the (2-picoline) Copper (I) Iodide Dimer

“…The temperature dependence of the bromine NQR frequencies in the cubic phase (III) of TiBr 4 is of par-3 According to [9] there are three polymorphous modifications of TiBr4. Two of them, studied by X-ray method, belong to the ST II [10] and III [11]. The structure of the third, birefringent, modification, has not been established.…”