Crystal structure of tetramethyl (1α,2β,3α,5α,6β,7α,8β,9α,11α,12β)-4,10- dioxahexacyclo[5.5.1.02,6.03,5. 08,12.09,11]tridecane-3,5,9,11-tetracarboxylate, C19H20O10
نویسندگان
چکیده
منابع مشابه
A stable dirhodium tetracarboxylate carbenoid: crystal structure, bonding analysis, and catalysis.
Transition metal catalyzed reactions of R-diazo ketones (1) are a powerful means to synthesize complex polycyclic organic frameworks.1 In particular, dirhodium(II) carboxylate and carboxamide catalysts mediate a wide range of synthetic transformations such as cyclopropanation,2 C-H and X-H insertion,3,4 aromatic substitution,5 and ylide formation.6 Enantioselective transformations promoted by c...
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A new pyridine-2,3,5,6-tetracarboxylato-bridged Fe(III) complex with a K+ counter ion, K[Fe(H2pdtc)2] (1), was prepared from the reaction of Fe2(SO4)3 · 7H2O, pyridine-2,3,5,6-tetracarboxylic acid and KOH under ambient conditions. The complex has been characterized by singlecrystal and powder X-ray diffraction, IR spectroscopy, TG analysis, elemental analyses, and magnetic measurements. Through...
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The crystal structure of the potassium salt of 2,2,5,5-tetramethyl-3-carboxypyrroline-1-oxyl (I), which is a free radical of the nitroxide type, has been determined by three-dimensional X-ray methods. The unit cell contains two crystallographically different types of molecule, one of which lies with its five-membered ring entirely in a mirror plane and is therefore perfectly flat. Molecules of ...
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The reaction of [PPhJ, NOS,] with CuCl and KSCN (1 :3:3) in acetone produces the yell-ow crystals of [PPh,], [WOS,(CuNCS),]. The crystals are triclinic, space group P1(2), z=2, a=12.4823(7), b=12.9224(7), c=18.6395(10)?, ?=83.907(5), ?= 73.152(4), Y= 65.194(4)'. The crystal structure was determined by single crystal Xray diffraction methods (Mo-K ?) and refined by least-squares calculations ...
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The structure of the nonaaquayttrium (III) bromate, [Y(H2O)9](BrO3)3, at low temperature (100 K) has been studied by means of single-crystal X-ray diffraction. Crystallography shows a hexagonal unit cell, space group P63/mmc (No. 194) with Z = 2, a = b = 11.7104(11) Å, c = 6.6259(5) Å and V = 786.90(12) Å3 at 100 K. The hydra...
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ژورنال
عنوان ژورنال: Zeitschrift für Kristallographie - New Crystal Structures
سال: 2002
ISSN: 2197-4578,1433-7266
DOI: 10.1524/ncrs.2002.217.2.207