7790-48-9Relevant articles and documents
Vapor pressure and thermodynamic functions of TeI4 and its decomposition products
Kut'in,Polyakov,Churbanov,Snopatin
, p. 1018 - 1023 (2007)
Using a flow method, we have measured the vapor pressure of tellurium tetraiodide, an attractive reagent for chemical vapor deposition technology. The results, combined with earlier tensimetric data, have been used to evaluate the basic thermodynamic functions of TeI4 and its thermolysis products.
Kniep, Ruediger,Katryniok, Detlef
, (1977)
Stabilization of decatellurium molecules in isolated and concatenated clusters
Guenther, Anja,Isaeva, Anna,Ruck, Michael
, p. 254 - 260 (2013/04/10)
Black, shiny crystals of the molecular cluster compounds (Te 10)[M(TeX4)(TeX3)]2 (M/X = Rh/Cl (1), Ir/Br (2)), (Te10)[Ru(TeI4)(TeI2)] 2 (3), (Te10)[M(TeI4)(TeI2)] 2(TeI4)(Te2I2) (M = Rh (4), Ir (5)) as well as the one-dimensional cluster polymer (Te10I 2)[Ir(TeI4)]2(Te4)I2 (6) were synthesized by melting reactions of an electron-rich transition metal M (M = Ru, Rh, Ir) with tellurium and TeX4 (X = Cl, Br, I). X-ray diffraction on single-crystals revealed that the compounds crystallize in the triclinic space group type P1. 4 and 5 show [3+1]-dimensional modulations of their structures. All compounds contain binuclear complexes with central μ-η4:η4-bridging Te10 units and terminal halogenidotellurate(II) groups. Each of the transition metal cations is in a slightly distorted octahedral coordination by six tellurium atoms; the two [MTe6] octahedra share a common edge. With the tellurium atoms acting as electron-pair donors, the 18 electron rule is fulfilled for the electrophilic M atoms. The central tricyclo[5.1.1.13, 5]- decatellurium molecule consists of two ecliptically stacked Te4 rings, which are linked through two tellurium atoms. The symmetric or asymmetric 3c4e bonds along these almost linear bridges are in analogy to polyanionic forms of tellurium, while the tricyclic conformation is stabilized by the strong bonding to the transition-metal cations. Multi-center bonding (3c4e) is also present in the terminal square [Te+IIX4]2- and the T-shaped [Te+IIX3]- groups. The crystal structures of 4 and 5 are organized in layers of (Te10)[M(TeI 4)(TeI2)]2n+ clusters (n ≤ 2) that are quite robust upon oxidation or reduction as shown by molecular calculations. These clusters alternate with incommensurately modulated layers that probably consist of TeI42- anions and a previously unknown Te2I2 molecule. The uncertainty arises primarily from equal scattering powers of I and Te atoms as well as from the known flexibility of the electron count of the Te10 unit. In 6, neutral Te4 rings concatenate (Te10I2)[Ir(TeI 4)]2 clusters into chains, which run parallel to the a axis. Copyright
Phase diagram and thermodynamic properties of the system As-Te-I
Aliev,Babanly,Babanly,Shevelkov,Amiraslanov
, p. 602 - 608 (2011/02/23)
The As-Te-I system has been investigated primarily by means of DTA, XRD analyses and EMF measurements with an arsenic electrode. The T-x diagram of the binary As-I system was accurately redefined and its phase diagram was constructed. A projection of the liquidus surface, an isothermal section at 300 K, and a series of polythermal sections of the phase diagram were constructed. The previously reported ternary compounds As5Te7I, As 4Te5I2 and As8Te7I 5 were confirmed to be equilibrium phases; the positions of phase areas with their participation were established. Areas of primary crystallization of phases, types and coordinates of the invariant equilibria on the T-x-y diagram were determined. From the X-ray powder diffraction (XRD) analysis, the crystallographic parameters of As4Te5I 2 and As8Te7I5 were determined. From the EMF measurements, the partial molar functions of arsenic (ΔG?,ΔH?,ΔS?) as well as standard integral thermodynamic functions of ternary compounds were calculated.
