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@article{763164, author = {Janickis, Vitalijus and Necas, Marek}, article_location = {Německo}, article_number = {5}, keywords = {Selenium; Bromoselenates(II-I); Mixed-valence Se(II)-Se(I) compounds; Crystal structure; Tetraphenylphosphonium ion}, language = {eng}, issn = {0044-2313}, journal = {Zeitschrift für Anorganische und Allgemeine Chemie}, title = {Synthesis and Crystal Structure of Bis(tetraphenylphosphonium) Hexabromo-diselenate(II)-bis{dibromodiselenate(I)}, [PPh4]2[Se2Br6(Se2Br2)2], the Salt of a Mixed-valence Bromoselenate(II,I) Anion}, url = {http://dx.doi.org/10.1002/zaac.200700518}, volume = {634}, year = {2008} }
TY - JOUR ID - 763164 AU - Janickis, Vitalijus - Necas, Marek PY - 2008 TI - Synthesis and Crystal Structure of Bis(tetraphenylphosphonium) Hexabromo-diselenate(II)-bis{dibromodiselenate(I)}, [PPh4]2[Se2Br6(Se2Br2)2], the Salt of a Mixed-valence Bromoselenate(II,I) Anion JF - Zeitschrift für Anorganische und Allgemeine Chemie VL - 634 IS - 5 SP - 905-910 EP - 905-910 PB - Wiley - VCH SN - 00442313 KW - Selenium KW - Bromoselenates(II-I) KW - Mixed-valence Se(II)-Se(I) compounds KW - Crystal structure KW - Tetraphenylphosphonium ion UR - http://dx.doi.org/10.1002/zaac.200700518 N2 - The Red crystals of [PPh4]2[Se2Br6(Se2Br2)2] (1) were obtained when selenium and bromine reacted in the solution of acetonitrile in the presence of tetraphenylphosphonium bromide. The crystal structure of 1 has been determined by X-ray diffraction and refined to R = 0.0201 for 4024 reflections. The crystals are triclinic, space group P-1 with Z = 2 and a = 11.2757(4) A, b = 12.3347(5) A, c = 12.4948(5) A, = 113.152(4)deg, = 114.745(4)deg, = 91.208(3)deg (120(2) K). In the solid state the anion of 1 is built up of the Se2Br6 core and two Se2Br2 molecules each of which is linked to one of the trans-positioned terminal Brt atoms of the Se2Br6 core. The central Se2Br6 part consists of a nearly planar arrangement of two planar SeBr4 units sharing a common edge through two 2-bridging Br atoms. The contact between the Brt and the SeI atom of the Se2Br2 molecule is 3.0872(5) A and can be interpreted as a bond of the donor-acceptor type with the Brt as donor and the Se2Br2 molecule as acceptor. The terminal SeII-Br and 2Br-SeII bond lengths are 2.3654(4), 2.6699(5) A and 2.5482(5), 3.0265(5) A, respectively. The bond lengths in the coordinated Se2Br2 molecule are: SeI-SeI = 2.2686(5) A, SeI-Br = 2.3779(5) and 2.3810(5) A. ER -
JANICKIS, Vitalijus a Marek NECAS. Synthesis and Crystal Structure of Bis(tetraphenylphosphonium) Hexabromo-diselenate(II)-bis$\{$dibromodiselenate(I)$\}$, [PPh4]2[Se2Br6(Se2Br2)2], the Salt of a Mixed-valence Bromoselenate(II,I) Anion. \textit{Zeitschrift für Anorganische und Allgemeine Chemie}. Německo: Wiley - VCH, 2008, roč.~634, č.~5, s.~905-910. ISSN~0044-2313.
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