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CAS No 19172-47-5 , 2,4-bis(4-methoxyphenyl)-2,4-bis(sulfanylidene)-1,3,2λ

  • Name: 2,4-bis(4-methoxyphenyl)-2,4-bis(sulfanylidene)-1,3,2λ
  • Synonyms: Lawesson's reagent;5,
    4λ5-dithiadiphosphetane; 19172-47-5;2,4-bis(4-methoxyphenyl)-2,4-bis(sulfanylidene)-1,3,2λ 4-Methoxyphenylthiophosphoric cyclic di(thioanhydride); NSC150550;
  • CAS Registry Number:
  • Transport: 3278
  • Melting Point: 228-231 ºC
  • Flash Point: 525.8°Cat760mmHg
  • Boiling Point: 525.8°Cat760mmHg
  • Density: 1.48g/cm3
  • Refractive index: 1.705
  • Safety Statements: R15/29;R20/21/22
  • Hazard Symbols: Xn: Harmful;F: Flammable;
  • Flash Point: 525.8°Cat760mmHg
  • EINECS: 242-855-4
  • Molecular Weight: 404.467284
  • InchiKey: CFHGBZLNZZVTAY-UHFFFAOYSA-N
  • InChI: InChI=1S/C14H14O2P2S4/c1-15-11-3-7-13(8-4-11)17(19)21-18(20,
    22-17)14-9-5-12(16-2)6-10-14/h3-10H,1-2H3
  • Risk Statements: S22;S36/37;S43;S8
  • Molecular Formula: C14H14O2P2S4
  • Molecular Structure:CAS No:19172-47-5 2,4-bis(4-methoxyphenyl)-2,4-bis(sulfanylidene)-1,3,2λ

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References of 2,4-bis(4-methoxyphenyl)-2,4-bis(sulfanylidene)-1,3,2λ
Title: Lawesson's Reagent
CAS Registry Number: 19172-47-5
CAS Name: 2,4-Bis(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide
Synonyms: anisyldithiophosphinic anhydride
Molecular Formula: C14H14O2P2S4
Molecular Weight: 404.47
Percent Composition: C 41.57%, H 3.49%, O 7.91%, P 15.32%, S 31.71%
Literature References: Thionating agent for conversion of carbonyls to thiocarbonyls. Prepn: H. Z. Lecher et al., J. Am. Chem. Soc. 78, 5018 (1956); and delineation of use: B. S. Pedersen et al., Bull. Soc. Chim. Belg. 87, 223 (1978); S. Scheibye et al., ibid., 229. Mechanistic study: T. B. Rauchfuss, G. A. Zank, Tetrahedron Lett. 27, 3445 (1986). Use in thionations: A. Z.-Q. Khan, J. Sandstr?m, J. Chem. Soc. Perkin Trans. 1 1988, 2085; S. Araki et al., Bull. Chem. Soc. Jpn. 61, 2977 (1988); as reducing agent for sulfoxides: H. Bartsch, T. Erker, Tetrahedron Lett. 33, 199 (1992). Review of thionation reactions: M. P. Cava, M. I. Levinson, Tetrahedron 41, 5061-5087 (1985); of applications in organic and organometallic syntheses: M. Jesberger et al., Synthesis 2003, 1929-1958.
Properties: mp 229°, should be stored under anhydrous conditions.
Melting point: mp 229°
Use: Thiation reagent.