13779-92-5Relevant articles and documents
Brixner, H.
, p. 257 - 263 (1962)
No solid solution compounds in between the binaries: Syntheses and crystal structures of Nb(Br0.62(4)Cl0.38(4))2Cl2 and NbI2Cl2
Reckeweg, Olaf,Schleid, Thomas
, p. 29 - 34 (2018)
The anion-mixed niobium tetrahalides Nb(Br0.62(4)Cl0.38(4))2Cl2 and NbI2Cl2 were obtained by heating NbBr5 with NbCl5 and NbI5 with NbCl5, respectively, in equimolar ratios with niobium metal in evacuated, torch-sealed silica ampoules at 720 K for 3 days. The orthorhombic title compounds form as very brittle black needles and were characterized by single-crystal X-ray diffraction [space group: Immm, Z = 4; a = 704.27(6), b = 824.13(7), c = 929.64(8) pm for Nb(Br0.62(4)Cl0.38(4))2Cl2 and a = 753.76(6), b = 829.38(7) and c = 983.41(8) pm for NbI2Cl2]. Surprisingly enough, these mixed-anionic halides are not isostructural with either NbCl4, NbBr4 or NbI4, but crystallize isotypically with TaI2Cl2, thus being examples for differential site occupancy stabilized materials. Structural features of other niobium(IV) halides are compiled and compared to those of Nb(Br0.62(4)Cl0.38(4))2Cl2 and NbI2Cl2. Except for NbF4, they all exhibit chains of trans-edge connected [NbX6]2? octahedra, which allow Peierls distortions to form Nb–Nb single bonds. The packing of these chains differ, however, depending on the actual halide or mixed-halide combination.
Corbett, J. D.,Seabaugh, P. W.
, p. 207 - 209 (1958)
Rolsten, R. F.
, p. 5409 - 5410 (1957)
Heavier Halides of Early Transition Elements by Halide-exchange Reactions. Crystal and Molecular Structure of2
Calderazzo, Fausto,Pallavicini, Piersandro,Pampaloni, Guido,Zanazzi, Pier Francesco
, p. 2743 - 2746 (2007/10/02)
The decahalogenodimetalates of zirconium(IV) as their triphenylmethyl deivatives have been obtained by the reaction of M(BH4)4 with the appropriate Ph3CX or by addition of Ph3CX to MX4.The crystal and molecular structure of2 h
