Benzene, 1,4-bis(methylseleno)-

Base Information

• Chemical Name: Benzene, 1,4-bis(methylseleno)-
• CAS No.: 40400-26-8
• Molecular Formula: C8H10Se2
• Molecular Weight: 264.085
• DSSTox Substance ID: DTXSID60193407
• Nikkaji Number: J930.953E
• Wikidata: Q83066146
• Mol file: 40400-26-8.mol

Synonyms:Benzene, 1,4-bis(methylseleno)-;40400-26-8;Benzene,1,4-bis(methylseleno)-;DTXSID60193407

Chemical Property of Benzene, 1,4-bis(methylseleno)-

Chemical Property:

• Vapor Pressure: 0.011mmHg at 25°C
• Boiling Point: 271.1°C at 760 mmHg
• Flash Point: 117.7°C
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 2
• Exact Mass: 265.91129
• Heavy Atom Count: 10
• Complexity: 73.3

Purity/Quality:

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

SDS file from LookChem

Useful:

• Canonical SMILES: C[Se]C1=CC=C(C=C1)[Se]C

Technology Process of Benzene, 1,4-bis(methylseleno)-

There total 8 articles about Benzene, 1,4-bis(methylseleno)- which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 43.0%

selenium (7782-49-2) + 1.4-dibromobenzene (106-37-6) + methyl iodide (74-88-4) → p-bis(methylselenyl)benzene (40400-26-8)

Guidance literature:

1.4-dibromobenzene; With tert.-butyl lithium; In tetrahydrofuran; pentane; at -78 - 20 ℃; Inert atmosphere;

selenium; In tetrahydrofuran; pentane; at 20 ℃; for 0.5h; Inert atmosphere;

methyl iodide; In tetrahydrofuran; pentane; at 20 ℃; for 1h; Inert atmosphere;

DOI:10.1021/ja903731m

Reference yield:

para-dichlorobenzene (106-46-7,84348-21-0) → p-bis(methylselenyl)benzene (40400-26-8)

Guidance literature:

Multi-step reaction with 3 steps

1: 1) MeSeLi / 1) DMF, THF, 120 degC, 8 h, 2) cooling

2: 1) MeSeLi / 1) DMF, THF, 120 degC, 14 h, 2) cooling

3: 1) Na / 1) HMPA, 100 degC, 2) cooling

With sodium; lithium methyl selenide;

DOI:10.1021/jo00171a027

Reference yield:

p-chlorophenyl isopropyl selenide (87136-88-7) → p-bis(methylselenyl)benzene (40400-26-8)

Guidance literature:

Multi-step reaction with 2 steps

1: 1) MeSeLi / 1) DMF, THF, 120 degC, 14 h, 2) cooling

2: 1) Na / 1) HMPA, 100 degC, 2) cooling

With sodium; lithium methyl selenide;

DOI:10.1021/jo00171a027

upstream raw materials:

benzene-1,4-diselenol

1.4-dibromobenzene

dimethyl sulfate

p-(methylselenyl)phenyl isopropyl selenide

Downstream raw materials:

p-(methylselenyl)phenyl ethyl selenide

Refernces

• 1、 Engman, Lars,Hellberg, Jonas S. E.. "A GENERAL PROCEDURE FOR THE SYNTHESIS OF METHYLTHIO-, METHYLSELENO- AND METHYLTELLURO-SUBSTITUTED AROMATIC COMPOUNDS". . p. 357 - 366. Retrieved 2007/10/02.