Journal ArticleDOI
CRYSTAL STRUCTURE OF T-BUTYL PERTHIOPHOSPHONIC ANHYDRIDE, (t-C4H9PS2)2, AND ITS SELENIUM ANALOG (t-C4H9PSe2)2
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TLDR
In this paper, it was shown that the sulfur compound is orthorhombic, Cmca, with a = 9.872 (1), b=9.724 (1) A, V=1479.0 (4) A3, Z=4, and Dc = 2.21 g cm−2.Abstract:
Crystals of the title sulfur compound are orthorhombic, Cmca, with a=9.872 (1), b=9.594 (1), and c=15.488 (1) A, V=1467.0 (4) A3, Z=4, and Dc =1.38 g cm−2. The final refinement using 537 observed reflections for 57 variable gave R=0.025. The non-isomorphous crystals of the selenium analog are also orthorhombic, Cmca, with a=9.300 (1), b=19.724 (1), c=8.064 (1) A, V=1479.1 (4) A, Z=4, and Dc =2.21 g cm−2. Refinement with 48 variables using 447 observed reflections gives R=0.041. In both structures the molecules have 2/m symmetry imposed by the lattice symmetry; the S (or Se) atoms of the central 4-membered ring are located on the rotation axis, and the P, exo S (or Se), and two carbon atoms of the t-butyl group lie on the mirror plane. The central rings are not readily hydrolyzed or oxidized by exposure to air, apparently as a result of steric protection provided by the t-butyl groups.read more
Citations
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Journal ArticleDOI
A New Synthesis of (PhPSe2)2 (Woollins Reagent) and Its Use in the Synthesis of Novel P–Se Heterocycles
TL;DR: Four novel phosphorus-selenium heterocycles, including a spirocyclic heterocycle exhibiting a four-membered P2SeC ring, were obtained from the reaction of WR with two reactive substrates (diphenylcyclopropenone and methyl phenylpropiolate).
Journal ArticleDOI
Formation and Reactivity of Phosphorus–Selenium Rings
Guoxiong Hua,J. Derek Woollins +1 more
TL;DR: Phosphorus-selenium ring chemistry has developed to include the synthesis of some exciting new motifs and provided organic chemists with a new reagent, [PhPSe(2)](2), which has become known as Woollins' reagent.
Journal ArticleDOI
Reaction of [{PhP(Se)(μ-Se)}2] with Dialkyl Cyanamides: X-ray Crystal Structures of the Phosphorus-Containing Triselenapentalenes [Me2N−C(Se)=N]2P(Se)Ph and [O(CH2CH2)2N−C(Se)=N]2P(Se)Ph
Journal ArticleDOI
Heterocycle formation using [PhP(Se)(μ-Se)]2. The crystal structures of [PhP(Se)(μ-Se)]2, PhP(Se)Se2(C7H10) and PhP(Se)(μ-Se)(μ-NPh)P(Se)Ph
TL;DR: An X-ray crystallographic study of [PhP(Se)(μ-Se)]21, the oxidation product of the homocycle (PhP)5 with ten equivalents of selenium, revealed that the molecule is centrosymmetric with a planar central P2(μ)-Se)2 core and trans disposition of exocyclic PSe bonds as mentioned in this paper.
Journal ArticleDOI
Synthesis and Structural Studies of Pyridine‐2‐selenolates − Reactions with Electrophilic Phosphorus(III) Compounds and Related Complex Chemistry
TL;DR: In this article, the reaction intermediates in the synthesis of 2,2′-bis(pyridyl) diselenide (2, 2′-Py2Se2) have been determined.
References
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Structure cristalline de l'hexathiodimétaphosphate d'argent, Ag2P2S6
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TL;DR: In this paper, the results of an X-ray analysis of tetraphosphorustrisulfide and bis(dimethylamino)sulfane were reported and discussed.
Journal ArticleDOI
Über 3,6-Dihydro-2H-1,2-thiaphosphorin-2-sulfide
TL;DR: In this paper, a 3,6-Dihydro-2H-1,2-thiaphosphorin-sulfide was Metallierung mit Alkylierungsmitteln in die entsprechenden Dithiophosphinsaureester ubergefuhrt werden konnen.