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ChemicalBook > Product Catalogue >Organic Chemistry >Organosulfur compounds >Lawesson's Reagent

Lawesson's Reagent

Lawesson's Reagent Structure
  • ₹846 - ₹34530
  • Product name: Lawesson's Reagent
  • CAS: 19172-47-5
  • MF: C14H14O2P2S4
  • MW: 404.47
  • EINECS:242-855-4
  • MDL Number:MFCD00005171
  • Synonyms:AURORA KA-1707;4-METHOXYPHENYLTHIOPHOSPHORIC CYCLIC DI(THIOANHYDRIDE);2,4-DI(4-METHOXYPHENYL)-1,3,2LAMBDA-5,4LAMBDA-5-DITHIADIPHOSPHETANE-2,4-DITHIONE;P-METHOXYPHENYLTHIONOPHOSPHINE SULFIDE DIMER;P-METHOXYPHENYLTHIOPHOSPHINE SULFIDE, DIMER;2,4-bis(4-methoxyphenyl)-1,3-dithia-2,4-diphosphetane 2,4-disulphide;2,4-Bis(methoxyphenyl)-1,3-dithia-2,4-diphosphetane-2,4-disulfide;Lawesson's Reagent [Sulfurating Reagent]
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Brand

  • TCI Chemicals (India)
  • Sigma-Aldrich(India)
  • ALFA India
  • ottokemi

Package

  • 5g
  • 10G
  • 25G
  • 25gm
  • 100gm
  • 100G
  • 250G
  • 500g
  • ManufacturerTCI Chemicals (India)
  • Product numberB1133
  • Product descriptionLawesson's Reagent [Sulfurating Reagent]
  • Packaging25G
  • Price₹2900
  • Updated2022-05-26
  • Buy
  • ManufacturerTCI Chemicals (India)
  • Product numberB1133
  • Product descriptionLawesson's Reagent [Sulfurating Reagent]
  • Packaging250G
  • Price₹17400
  • Updated2022-05-26
  • Buy
  • ManufacturerSigma-Aldrich(India)
  • Product number227439
  • Product descriptionLawesson reagent 97%
  • Packaging25G
  • Price₹1872.73
  • Updated2022-06-14
  • Buy
  • ManufacturerSigma-Aldrich(India)
  • Product number227439
  • Product descriptionLawesson reagent 97%
  • Packaging10G
  • Price₹2045.93
  • Updated2022-06-14
  • Buy
  • ManufacturerSigma-Aldrich(India)
  • Product number227439
  • Product descriptionLawesson reagent 97%
  • Packaging100G
  • Price₹8237.83
  • Updated2022-06-14
  • Buy
  • ManufacturerALFA India
  • Product numberALF-A14530-36
  • Product descriptionThermo Scientific™ Lawesson's Reagent, 97%
  • Packaging500g
  • Price₹34530
  • Updated2022-05-26
  • Buy
  • ManufacturerALFA India
  • Product numberALF-A14530-22
  • Product descriptionThermo Scientific™ Lawesson's Reagent, 97%
  • Packaging100g
  • Price₹15469
  • Updated2022-05-26
  • Buy
  • ManufacturerALFA India
  • Product numberALF-A14530-14
  • Product descriptionThermo Scientific™ Lawesson's Reagent, 97%
  • Packaging25g
  • Price₹5091
  • Updated2022-05-26
  • Buy
  • ManufacturerALFA India
  • Product numberALF-A14530-06
  • Product descriptionThermo Scientific™ Lawesson's Reagent, 97%
  • Packaging5g
  • Price₹1120
  • Updated2022-05-26
  • Buy
  • Manufacturerottokemi
  • Product number L 1288
  • Product descriptionLawesson's reagent
  • Packaging25gm
  • Price₹846
  • Updated2022-05-26
  • Buy
  • Manufacturerottokemi
  • Product number L 1288
  • Product descriptionLawesson's reagent
  • Packaging100gm
  • Price₹3249
  • Updated2022-05-26
  • Buy
Manufacturer Product number Product description Packaging Price Updated Buy
TCI Chemicals (India) B1133 Lawesson's Reagent [Sulfurating Reagent] 25G ₹2900 2022-05-26 Buy
TCI Chemicals (India) B1133 Lawesson's Reagent [Sulfurating Reagent] 250G ₹17400 2022-05-26 Buy
Sigma-Aldrich(India) 227439 Lawesson reagent 97% 25G ₹1872.73 2022-06-14 Buy
Sigma-Aldrich(India) 227439 Lawesson reagent 97% 10G ₹2045.93 2022-06-14 Buy
Sigma-Aldrich(India) 227439 Lawesson reagent 97% 100G ₹8237.83 2022-06-14 Buy
ALFA India ALF-A14530-36 Thermo Scientific™ Lawesson's Reagent, 97% 500g ₹34530 2022-05-26 Buy
ALFA India ALF-A14530-22 Thermo Scientific™ Lawesson's Reagent, 97% 100g ₹15469 2022-05-26 Buy
ALFA India ALF-A14530-14 Thermo Scientific™ Lawesson's Reagent, 97% 25g ₹5091 2022-05-26 Buy
ALFA India ALF-A14530-06 Thermo Scientific™ Lawesson's Reagent, 97% 5g ₹1120 2022-05-26 Buy
ottokemi L 1288 Lawesson's reagent 25gm ₹846 2022-05-26 Buy
ottokemi L 1288 Lawesson's reagent 100gm ₹3249 2022-05-26 Buy

Properties

Melting point :228-230 °C(lit.)
Boiling point :525.8±60.0 °C(Predicted)
Density :1.48±0.1 g/cm3(Predicted)
storage temp. :Inert atmosphere,2-8°C
solubility :Chloroform (Slightly)
form :Powder
color :White to almost white
Water Solubility :Decomposition
Sensitive :Moisture Sensitive
Merck :14,5391
BRN :1024888
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
InChIKey :CFHGBZLNZZVTAY-UHFFFAOYSA-N
SMILES :S1P(=S)(C2=CC=C(OC)C=C2)SP1(=S)C1=CC=C(OC)C=C1
CAS DataBase Reference :19172-47-5(CAS DataBase Reference)
EPA Substance Registry System :1,3,2,4-Dithiadiphosphetane, 2,4-bis(4-methoxyphenyl)-, 2,4-disulfide (19172-47-5)

Safety Information

Symbol(GHS): GHS hazard pictograms
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H261 In contact with water releases flammable gas Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases Category 2
Category 3
Danger
Warning
GHS hazard pictograms P231+P232, P280, P370+P378,P402+P404, P501
Precautionary statements:
P231+P232 Handle under inert gas. Protect from moisture.
P422 Store contents under …

Description

Lawesson's reagent, also known as Lloyd's reagent, is a commonly used chemical reagent in the preparation of organic sulfur compounds. At room temperature under normal pressure, it appears as the solid yellow powder with a strong smell of rotten. In 1956, it was first successfully produced by the reaction between arene and tetraphosphorus decasulfide. The Swedish chemist Sven-Olov Lawesson has carefully studied its reaction with organic compounds, so that its application has been greatly promoted, so the name also derived. The molecule of the Lawesson's reagent contains the four-membered ring structure alternately composed of sulfur and phosphorus.
Upon being heated, it undergoes depolymerization, generating two molecules of unstable ylide (R-PS2), which are the major reactive intermediates. Upon application of the Lawesson’s reagents with two different substitution groups for reaction, it has been observed of molecules with substituent group exchanged with each other in the 31 NMR spectrum of the product, confirming the existence of the intermediates, R-PS2.
Lawesson's reagent is an oxygen-sulfur exchange reagent with the most common application being for the preparation of thioamides and converting carbonyl compounds into sulfur carbonyl compounds. The reacted substrates can include ketone, ester, lactone, amide, lactam, and quinone. The electron-rich carbonyl groups are easier to react. Upon reaction with α, β-unsaturated aldehydes and ketones, the double bond is not affected.

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