CRYSTAL-STRUCTURE OF TRANS-PYH[MOBR4PY2] AND REACTIVITY OF TRANS-PYH[MBR4PY2] (M = MO, W, PY = PYRIDINE) TOWARDS NITROGEN LIGANDS AND BROMINE OXIDATION

被引：10
作者：
BRENCIC, JV
CEH, B
LEBAN, I
MODEC, B
ROTAR, R
机构：
[1] Department of Chemistry, University of Ljubljana, Ljubljana, 61001
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1993年 / 619卷 / 04期
关键词：
MOLYBDENUM TUNGSTEN COMPLEXES; PYRIDINIUM MOLYBDENUM TUNGSTEN TETRABROMINE COMPLEXES; CRYSTAL STRUCTURE;
D O I：
10.1002/zaac.19936190427
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The crystal structure of trans-pyH[MoBr4py2] has been determined: orthorhombic, Pnma (No. 62), a = 16.197(3), b = 13.995(3), c = 8.615(1) angstrom, Z = 4, D(c) = 2.23, D0 = 2.20(3) g/cm3, V = 1953(1) angstrom3. R1, R(W) = 0.057 and 0.053. Trans-[MoBr4py2]- anions with staggered conformation of pyridine rings are located on the mirror planes. Mo-Br, Mo-N(pyridine) distances are 2.593(1), 2.573(1), 2.227(8) and 2.213(7) angstrom. Cations are located on the symmetry centers. The cation in trans-pyH[MBr4py2] can be replaced. Trans-NH4[MBr4py2] . H2O, Cs[MBr4py2], LH[MBr4py2] (M = Mo, W; L = 4-methylpyridine, 4-pic; 2,2'-bipyridyl, bipy) were prepared. The compounds of molybdenum and tungsten with the same chemical composition are isostructural. All compounds react with pyridine and 4-methylpyridine. The products are trans-MBr3L3, and in the case of molybdenum, also trans-MoBr3py2(4-pic). Bromine oxidizes trans-M(I)[MBr4py2] to trans-MBr4py2.
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页码：796 / 800
页数：5
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