2406-33-9

Basic information

• Product Name: CYCLOTETRAMETHYLENEDICHLOROSILANE
• Synonyms: 1,1-DICHLOROSILACYCLOPENTANE;CYCLOTETRAMETHYLENEDICHLOROSILANE;Cyclotetramethylenedichlorosilane(1,1-Dichlorosilacyclopentane);1,1-Dichloro-1-silacyclopentane;1,1-dichloro-silacyclopentan;1,1-Dichlorosilolane;Silacyclopentane,1,1-dichloro-
• CAS NO: 2406-33-9
• Molecular Formula: C₄H₈Cl₂Si
• Molecular Weight: 155.1
• EINECS: 219-299-6
• Mol File: 2406-33-9.mol
• Article Data: 11

Chemical Properties

• Melting Point: <0°C
• Boiling Point: 142 °C
• Flash Point: 25°C
• Appearance: /
• Density: 1.185
• Vapor Pressure: 5.29mmHg at 25°C
• Refractive Index: 1.4630
• CAS DataBase Reference: CYCLOTETRAMETHYLENEDICHLOROSILANE(CAS DataBase Reference)
• NIST Chemistry Reference: CYCLOTETRAMETHYLENEDICHLOROSILANE(2406-33-9)
• EPA Substance Registry System: CYCLOTETRAMETHYLENEDICHLOROSILANE(2406-33-9)

Safety Data

• Hazard Codes: C
• Statements: 10-34
• Safety Statements: 16-26-36/37/39-45-7/9
• RIDADR: 2986
• TSCA: Yes
• Hazardous Substances Data: 2406-33-9(Hazardous Substances Data)

Usage

General Description

Cyclotetramethylenedichlorosilane is a chemical compound with the formula C4H8Cl2Si. It belongs to the class of organosilicon compounds. This chemical, also known as 2,4-Dichloro-1,3,2-dioxasilenacyclobutane, is typically synthesized using complex chemical reactions. It is characterized by its high reactivity due to the presence of two chlorine atoms. The compound is used in a variety of applications, notably in creating silicon-based polymers or resins, and for chemical synthesis in laboratories and industries. As with all chemicals, due diligence must be taken when handling, storing, and using this compound, given its reactive nature and potential hazards.

InChI:InChI=1/C4H8Cl2Si/c5-7(6)3-1-2-4-7/h1-4H2

Upstream product

• 110-52-1 1,4-dibromo-butane 
• 110-56-5 1,4-dichlorobutane 
• 23708-47-6 1,4-bis(bromomagnesium)butane 

Downstream Products

• 3944-13-6 1,1-Diaethyl-silacyclopentan 
• 18035-51-3 1,1'-diethyl-1,1'-oxy-bis-silolane 
• 288-06-2 silacyclopentane 
• 1093117-39-5 1,1-bis(cyclohexenyloxy)silolane 
• 7488-24-6 1-chloro-1-phenylsilacyclopentane 
• 1232692-93-1 2-(1-phenylsilolan-1-yl)pyridine 
• 3944-16-9 1,1-diphenylsilacyclopentane 

Relevant articles and documents

Conformational stability, ab initio calculations and vibrational assignment for 1,1-difluoro- and 1,1-dichloro-1-silacyclopentane

The infrared spectrum (3200-400 cm-1) of the gas and the Raman spectrum (3200-50 cm-1) of liquid and solid 1,1-difluoro-1- silacyclopentane and 1,1-dichloro-1-silacyclopentane have been recorded. In all of these physical states only the twisted (C2) conformer was detected. The conformational energies have been calculated with the Moller-Plesset perturbation method to the second order; MP2(Full) as well as the density functional theory by the B3LYP method utilizing a variety of basis sets up to 6-311 + G(2df,2pd). All the calculations predict only the twisted form as the stable conformer of 1,1-difluoro-1-silacyclopentane with the average barrier to planarity of 2548 cm-1 (30.49 kJ/mol) from the MP2 calculations and a significantly lower value of 1422 cm-1 (17.01 kJ/mol) from the density functional calculations. Neither calculation was significantly affected by the inclusion of diffuse functions. The Cs conformer has a lower energy of 1703 cm-1 (MP2) and 1334 cm -1 (B3LYP) than the planar form. Thus the path between the two identical C2 conformers is by pseudorotational motion rather than through the planar form. Similar results obtain for 1,1-dichloro-1- silacyclopentane. The optimized geometry calculated with the 6-311 + G(2df,2pd) basis is given together with a complete vibrational assignment for the twisted (C2) conformer. These assignments are supported by normal coordinate calculations with scaled force constants from MP2(Full)/6-31G(d) calculations. The results of these spectroscopic and theoretical studies are discussed and compared to the corresponding results for silacyclopentane.

Pure rotational spectrum and structural determination of 1,1-difluoro-1-silacyclopentane

The ground state, pure rotational spectrum of 1,1-difluoro-1-silacyclopentane has been studied using chirped-pulse, Fourier transform microwave (CP-FTMW) spectroscopy and observed in the 6-20.3 GHz region of the electromagnetic spectrum. This spectrum was acquired leveraging the deep averaging capability of the technique. The parent species, 13C, 29Si, and 30Si singly substituted isotopologues were observed in natural abundance and are reported. Only one conformer, the C2 conformer (half-chair), was observed. This is confirmed with a determined CCCC dihedral angle of -48.1(11)°. The spectrum is comprised of entirely a-type transitions in accordance with quantum chemical calculations. Multiple split transitions are present in the spectrum which have been attributed to a ring-twisting of the carbon atoms attached to the silicon atom in the ring. This motion has the carbons crossing the a-axis in the bc-plane leading to an inversion potential. Potential energy surfaces for the ring-twisting motion were undertaken and the experimentally determined energy level difference observed in comparison to these surfaces is reasonable. A Kraitchman analysis of the experimentally determined, singly substituted isotopologues is in agreement with the optimized, twisted (nonplanar) equilibrium structure. This structure has been compared to other similar silicon-containing ring molecules using second moment arguments and these comparisons are discussed.

METHOD FOR PREPARING OF NOVEL LIGAND COMPOUND AND TRANSITON METAL COMPOUND

The present invention relates to a ligand compound and to a method for preparing a transition metal compound, wherein the ligand compound and the transition metal compound containing the ligand compound exhibits excellent copolymerization properties, thereby being able to be used for preparing olefin-based polymers, particularly, olefin-based polymers with high molecular weight and low density.COPYRIGHT KIPO 2019

A kind of preparation method of the midbody of entecavir, and intermediate

The invention discloses Entecavir intermediates and a preparation method thereof. The preparation method of an Entecavir intermediate represented by a formula IV or IV' shown in descriptions comprises the following step of enabling a compound V to be subjected to amino protecting group and hydroxyl protecting group removal reaction in the presence of protonic acid in a solvent. The preparation method disclosed by the invention has the advantages that raw materials are cheap and are easily obtained, reaction conditions are mild, side reactions are few, the yield is high, the pollution to the environment is little, and the intermediates are easily purified and separated, so that the preparation method is applicable to industrial production.