55259-49-9

Basic information

• Product Name: TETRAMETHYLTETRASELENAFULVALENE
• Synonyms: TETRAMETHYLTETRASELENAFULVALENE;1,3-Diselenole, 2-(4,5-dimethyl-1,3-diselenol-2-ylidene)-4,5-dimethyl-;1,3-Diselenole, 4,5-dimethyl-2-(4,5-dimethyl-1,3-diselenol-2-ylidene)-;4,4',5,5'-Tetramethyl-DELTA2,2'-bi-1,3-diselenole;4,4',5,5'-Tetramethyl-Δ2,2'-bi(1,3-diselenole);Δ2,2'-Bi[4,5-dimethyl-1,3-diselenole];Tetramethyltetraselenafulvalene,97%;Tetramethytetraselenafulvalene
• CAS NO: 55259-49-9
• Molecular Formula: C10H12Se4
• Molecular Weight: 448.04
• Product Categories: Building Blocks;Chemical Synthesis;Heterocyclic Building Blocks;Others;Se-Containing
• Mol File: 55259-49-9.mol
• Article Data: 12

Chemical Properties

• Melting Point: 273-275 °C (dec.)(lit.)
• Boiling Point: 338.8°C at 760 mmHg
• Flash Point: 158.7°C
• Appearance: /solid
• Vapor Pressure: 0.000188mmHg at 25°C
• Storage Temp.: 2-8°C
• BRN: 1619644
• CAS DataBase Reference: TETRAMETHYLTETRASELENAFULVALENE(CAS DataBase Reference)
• NIST Chemistry Reference: TETRAMETHYLTETRASELENAFULVALENE(55259-49-9)
• EPA Substance Registry System: TETRAMETHYLTETRASELENAFULVALENE(55259-49-9)

Safety Data

• Hazard Codes: T,N
• Statements: 23/25-33-50/53
• Safety Statements: 20/21-28-45-60-61
• RIDADR: UN 3283 6.1/PG 2
• WGK Germany: 3
• HazardClass: 6.1(a)
• PackingGroup: II
• Hazardous Substances Data: 55259-49-9(Hazardous Substances Data)

Usage

Chemical Properties

Red-violet crystalline powder

Uses

Different sources of media describe the Uses of 55259-49-9 differently. You can refer to the following data:
1. Its salts and charge-transfer complexes exhibit superconducting properties. For a review on the chemistry of TMTSF and analogous electron donors for organic metals,see Front. Solid State Sci. .1
2. Tetramethyltetraselenafulvalene was used in the preparation of charge-transfer salt nanowires using the galvanostatic deposition technique.

General Description

Tetramethyltetraselenafulvalene salts and charge-transfer complexes exhibit superconducting properties.

InChI:InChI=1/C10H12Se4/c1-5-6(2)12-9(11-5)10-13-7(3)8(4)14-10/h1-4H3

Upstream product

• 59089-89-3 4,5-Ethylenedithio-1,3-dithiole-2-thione 
• 53808-62-1 4,5-dimethyl-2-selenoxo-1,3-diselenole 
• 110521-58-9 4,5-ethylenedithio-1,3-dithio-2-selenone 
• 74962-30-4 2,6,8,10-Tetrathiabicyclo<5.3.0>dec-1(7)-en-9-on 
• 74962-29-1 2,5,7,9-tetrathiabicyclo[4.3.0]non-1⁽⁶⁾-en-8-one 
• 107907-53-9 4,5-tetramethylene 1,3-diselenole 2-selenone 
• 53808-61-0 methyl-2-selenoxo-1,3-diselenole 
• 80623-57-0 4,5-dimethyl-1,3-diselenol-2-one 
• 144000-05-5 2-isopropylidene-1,3-dithiolo<4,5-d>-1,3-dithiol-2-one 
• 342392-81-8 4-methylthio-5-(2-methoxycarbonylethylthio)-1,3-diselenone-2-selone 
• 756878-94-1 5,6-dihydro-4,7-dioxa-1,3-diselena-indene-2-selone 
• 53808-68-7 (2-oxobutyl)-N,N-pentamethylenediselenocarbamate 
• 76371-67-0 (2-oxobutyl)-N,N-dimethyldiselenocarbamate 

Downstream Products

• 503-17-3 dimethylacetylene 
• 474026-39-6 ethenediselone 
• 506-80-9 carbon diselenide 

Relevant articles and documents

Ambient-pressure organic superconductors κ-(DMEDOTSeF) 2[Au(CN)4](Solv.): Tc tuning by modification of the solvent of crystallization

The unsymmetrical π donor dimethyl(ethylenedioxy)tetraselenafulvalene (DMEDO-TSeF) has provided six new organic superconductors with a monovalent square-planar [Au(CN)4] ion and cyclic ethers as solvent of crystallization. The six new organic superconductors κ-(DMEDOTSeF) 2[Au(CN)4](Solv.) [solv. = 1,3-dioxolane (DOL), 2,5-dihydrofuran (DHF), tetrahydropyran (THP), 1,3-dioxane (1,3-DOX), 3,4-dihydro-2Hpyran (DHP), or 1,4-dioxane (1,4DOX)] are classified into two subphases κL and κ′ according to the differen ces in their space group symmetry. κL(DMEDO-TSeF) 2[Au(CN)4](Solv.) (solv. = DOL, DHF, THP, 1,3-DOX or DHP) crystallizes in the orthorhombic space group Prima, and Tc of the κL phase varies by 1.7-5.3 K according to the size and shape of the solvent of crystallization. On the other hand, κ′ (DMEDO-TSeF)2[Au(CN)4](Solv.) (solv. = DOL or 1,4-DOX) crystallizes in the noncentrosymmetric monoclinic space group Cc. The κ′-phase containing 1,4-DOX shows superconductivity at 4.2 K, but the κ′-phase containing DOL does not show superconductivity down to 1.4 K. Systematic investigation of the six new organic superconductors, together with the two previously reported superconductors κH- and κL(DMEDO-TSeF)2[Au(CN)4](THF), revealed that the Tc of the present system is finely tunable by utilizing the effect of the solvent of crystallization.

Molecular modifications of methylenedithio-tetraselenafulvalene (MDT-TSF) and methylenedithio-diselenadithiafulvalene (MDT-ST) for superior electron donors

The dimethyl-, bis(methylthio)-, and ethylenedithio-derivatives of methylenedithio-tetraselenafulvalene and methylenedithio-diselenadithiafulvalene have been synthesized as new electron donors. The formation and electrical conductivities of their radical

NEW CONDUCTING SALTS CONTAINING UNSYMMETRICAL ?-DONORS

This communication describes the synthesis and the electrochemical properties of a new type of donor containing sulfur or selenium atoms: the dimethyltetramethylenetetraselenafulvalene 1 and the dimethyltetramethylenetetrathiafulvalene 2.The electrical conductivity of their charge transfer complexes and of some of their radical cation salts are reported.