1687-58-7

Basic information

• Product Name: 1,3-diphenylimidazolidine-2-thione
• CAS NO: 1687-58-7
• Molecular Formula: C₁₅H₁₄N₂S
• Molecular Weight: 254.3501
• Mol File: 1687-58-7.mol
• Article Data: 6

Chemical Properties

• Boiling Point: 372.2°C at 760 mmHg
• Flash Point: 178.9°C
• Density: 1.27g/cm³
• Vapor Pressure: 9.8E-06mmHg at 25°C
• Refractive Index: 1.714
• CAS DataBase Reference: 1,3-diphenylimidazolidine-2-thione(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3-diphenylimidazolidine-2-thione(1687-58-7)
• EPA Substance Registry System: 1,3-diphenylimidazolidine-2-thione(1687-58-7)

Safety Data

• Hazardous Substances Data: 1687-58-7(Hazardous Substances Data)

Usage

Chemical compound

1,3-diphenylimidazolidine-2-thione

Usage

Vulcanization accelerator in the rubber industry

Role

Cross-linking of rubber molecules

Benefits

Enhances elasticity and strength of rubber

Additional uses

Stabilizer in plastics, intermediate in organic synthesis

Chemical structure

Sulfur-based compound

Safety precautions

Can be irritating to skin, eyes, and respiratory system

Hazards

Harmful if ingested or inhaled in large quantities

Handling

Should be handled with care to avoid exposure and potential health risks

Upstream product

• 6160-65-2 1,1'-Thiocarbonyldiimidazole 
• 150-61-8 N,N'-diphenylethylenediamine 
• 2513-64-6 1,3-diphenylimidazolidine 
• 109531-88-6 2--1,3-diphenylimidazolidin 
• 76499-68-8 2,2'-dithiobis(1,3-diphenyl-2-imidazolinium) ditriflate 
• 2179-89-7 bis(1,3-diphenyl-2-imidazolidinylidene) 
• 55055-34-0 N-formyl-N,N'-diphenylethylenediamine 
• 75-15-0 carbon disulfide 
• 53316-26-0 <1,3-Diphenylimidazolidinium>-carbodithioat 

Downstream Products

• 76499-71-3 1,3-diphenyl-2-imidazolinium triflate 
• 728-24-5 1,3-diphenyl-2-imidazolidone 
• 76499-68-8 2,2'-dithiobis(1,3-diphenyl-2-imidazolinium) ditriflate 

Relevant articles and documents

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C-H activation with elemental sulfur: Synthesis of cyclic thioureas from formaldehyde aminals and S8

The C-H activation of cyclic formaldehyde aminals LCH2 (L = RNCH2CH2CH2-NR and RNCH2CH2-NR, R = Me, Et, iPr, tBu, or Ph) with S8 proceeds at unusually low temperatures (T 2S. The reaction constitutes a new, solvent-free method for the synthesis of thioureas that eliminates the toxic and highly flammable CS2. For R = tBu, the ionic carbenium thiocyanates [LCH]+ SCN- dominate the product spectrum and the respective thioureas are obtained in low yield. The reactivity of the analogous sulfur and oxygen ring systems towards S8 was investigated. 1,3-Dithiolane is cleanly converted into 1,3-dithiolane-2-thione (S8, 14 d, 190°C) and resembles the cyclic formaldehyde aminals in this respect. 1,3-Dioxolane (L = OCH2CH2O) is completely inert towards sulfur even under forceful reaction conditions (190°C, 14 d). The formation of thioureas from aminals was investigated at the CBS-4 and B3LYP/6-31G(d) levels of theory.

THIONO COMPOUNDS. 5. PREPARATION AND OXIDATION OF SOME THIONO DERIVATIVES OF IMIDAZOLES

1,3-Dimethyl-3H-imidazole-2-thione (3), prepared by a much improved procedure from 1,3-dimethylimidazolium iodide (6) with sulfur and organic base, was oxidized with H2O2 in MeOH; three molar proportions of H2O2 were consumed, 1,3-dimethylimidazolium picrate (14; synthesized independently) was isolated in 61percent yield, and 80percent of the expected sulfate ion was found.Oxidation of the analogous imidazolidine (4), prepared from 1,3-dimethyl-2-imidazolidone (16) with Lawesson's reagent (17), gave a counterpart picrate (73percent from 4) in a similar but slower reaction. 1,3-Diphenyl-2-imidazolidinethione (5) had to be oxidized in DMF-AcOH, with H2SO4 catalysis, and only 1,3-diphenyl-2-imidazolidone (19, 63percent) could be isolated.Understanding is added to the behavior in oxidations of thiono derivatives of imidazoles by these extensions of several earlier studies to different types within the class, i.e., of an N-unsubstituted one (1) to the N,N-dimethyl counterpart (4), of an N-methyl unsaturated one (2) to the N,N-dimethyl counterpart (3), and of an N,N-diphenyl unsaturated one (23) to the saturated counterpart (5).Similarities and differences are discussed relative to members of the class studied previously, along with information that improves understanding of the different courses of reactions various members of the class may follow when they are oxidized.