三溴化钒

三溴化釩，VBr3，在固體形態中，是一種被六個溴配位基圍繞八面體钒的配位聚合物。

三溴化釩可由四氯化釩與溴化氫反應制得：
2 VCl4  + 8 HBr  →  2 VBr3  +  8 HCl  +  Br2
這個反應會在恢復致室溫時繼續反應，通過不穩定的四溴化釩VBr4，釋放出溴蒸氣Br2。Calderazzo, F.; Maichle-Mossmer, C.; Pampaloni, G. and Strähle, J., "Low-temperature Syntheses of Vanadium(III) and Molybdenum(IV) Bromides by Halide Exchange", Journal of the Chemical Society, Dalton Transactions, 1993, pages 655-8.

就像三氯化釩VCl3，三溴化釩與乙二醇二甲醚和四氫呋喃形成紅棕色固體復合物，例如VBr3(THF)3。G. W. A. Fowles, G. W. A.; Greene,  P. T.; Lester, T. E. "Ether Complexes of Tervalent Titanium and Vanadium" J. inorg, nucl. Chem., 1967. Vol. 29. pp. 2365 to 2370.

三溴化釩水解生成含[VBr2(H2O)4]+的鹽。這些溶液揮發後生成[VBr2(H2O)4]Br。Donovan,  W. F.; Smith, P. W. "Crystal and Molecular Structures of Aquahalogenovanadium(1ii) Complexes. Part 1. X-Ray Crystal Structure of trans-Tetrakisaquadibromovanadium(III) Bromide Dihydrate and the lsomorphous Chloro-compound" Journal of the Chemical Society, Daltor Transactions." 1975, pages 894-896.

參考資料

拓展閱讀
Stebler, A.; Leuenberger, B.; Guedel, H. U.  "Synthesis and crystal growth of A3M2X9 (A = Cs, Rb; M = Ti, V, Cr; X = Cl, Br)"    Inorganic Syntheses  (1989),  volume 26, pages 377-85.

Category:溴化物
Category:卤化钒
Category:三价釩化合物