7796-59-0

Basic information

• Product Name: tetramethylcyclodisilthiane
• Synonyms: tetramethylcyclodisilthiane
• CAS NO: 7796-59-0
• Molecular Weight: 180.442
• Mol File: 7796-59-0.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: tetramethylcyclodisilthiane(CAS DataBase Reference)
• NIST Chemistry Reference: tetramethylcyclodisilthiane(7796-59-0)
• EPA Substance Registry System: tetramethylcyclodisilthiane(7796-59-0)

Safety Data

• Hazardous Substances Data: 7796-59-0(Hazardous Substances Data)

Upstream product

• 75-78-5 dimethylsilicon dichloride 
• 182680-28-0 Dimethyl-prop-2-ynylsulfanyl-silane 
• 62827-97-8 Bis(trimethylsilyl)thioketene 
• 1450-14-2 1,1,1,2,2,2-hexamethyldisilane 

Relevant articles and documents

Facile Construction of Yttrium Pentasulfides from Yttrium Alkyl Precursors: Synthesis, Mechanism, and Reactivity

Treatment of the yttrium dialkyl complex TpMe2Y(CH2Ph)2(THF) (TpMe2 = tri(3,5 dimethylpyrazolyl)borate, THF = tetrahydrofuran) with S8 in a 1:1 molar ratio in THF at room temperature afforded a yttrium pentasulfide TpMe2Y(κ4-S5) (THF) (1) in 93% yield. The yttrium monoalkyl complex TpMe2CpYCH2Ph(THF) reacted with S8 in a 1:0.5 molar ratio under the same conditions to give another yttrium pentasulfide [(TpMe2)2Y]+[Cp2Y(κ4-S5)]? (10) in low yield. Further investigations indicated that the S52- anion facilely turned into the corresponding thioethers or organic disulfides, and released the redundant S8, when it reacted with some electrophilic reagents. The mechanism for the formation of the S52- ligand has been investigated by the controlling of the reaction stoichiometric ratios and the stepwise reactions.

Dimethylsilanethione - Generation by retro-ene reaction and cycloaddition with ketene

Dimethylsilanethione was cleanly generated, under flash vacuum thermolysis conditions, by retro-ene cleavage of propargylthiodimethylsilane. The cothermolysis of this latter and ketene dimer led in 60% yield to an only [2 + 2] cycloadduct, 2,2-dimethyl-4-methylene-2-sila-3-thiaoxetane, which in turn can be cleaved at higher temperature to give hexamethylcyclotrisiloxane.

METALLA IV-b-PHOSPHOLANNES II-METALLA-2 (OXA-, THIA- ou AZA-)-3 PHOSPHOLANNES

2-sila-, germa- or stanna- 3-(oxa-, thia- or aza-) phospholanes have been synthesized by reactions of dihalometalla-IV-b compounds with dilithiated β-phosphorus alcohols, thiols or amines HYCH2CH2P(H)Ph (Y=O, S, NMe).Germa- and stanna- heterocycles can also be obtained from germyl- or stannyldiamines and the same β-phosphorus alcohols, thiols or amines. 2-sila 3-(oxa- or thia-) phospholanes are of particular interest for their decomposition reaction leading to silanone or silathione and phosphirane.