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930-26-7

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930-26-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 930-26-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 9,3 and 0 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 930-26:
(5*9)+(4*3)+(3*0)+(2*2)+(1*6)=67
67 % 10 = 7
So 930-26-7 is a valid CAS Registry Number.
InChI:InChI=1/C6H8/c1-6-4-2-3-5-6/h2,4H,1,3,5H2

930-26-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 14, 2017

Revision Date: Aug 14, 2017

1.Identification

1.1 GHS Product identifier

Product name 3-methylidenecyclopentene

1.2 Other means of identification

Product number -
Other names 3-Methylenecyclopentene

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:930-26-7 SDS

930-26-7Downstream Products

930-26-7Relevant articles and documents

Controlled radical polymerization of 3-methylenecyclopentene with N-substituted maleimides to yield highly alternating and regiospecific copolymers

Yamamoto, Daisuke,Matsumoto, Akikazu

, p. 9526 - 9536 (2014/03/21)

High-molecular-weight diene copolymers with a regiospecific repeating structure were produced in a high yield during the alternating radical copolymerization of N-substituted maleimides (RMIs) and 3-methylenecyclopentene (MCP) as the cyclic 1,3-diene monomer including a reactive exomethylene moiety. The eminent copolymerization reactivity of MCP was in contrast to the predominant occurrence of the Diels-Alder reaction of isoprene with the RMIs rather than copolymerization. The highly alternating structure of the copolymers was confirmed based on the monomer reactivity ratios for the copolymerization of MCP (M1) and N-phenylmaleimide (PhMI, M2), r 1 = 0.010 and r2 = 0.0080. A mechanism for the highly controlled 1,4-regiospecific propagation, which consists of the addition of an RMI radical to the exomethylene group of MCP and subsequent 1,4-regiospecific propagation, was supported by the DFT calculations using model reactions as well as the precise structure determination of oligomers produced during telomerization in the presence of 1-butanethiol as a chain transfer agent. The resulting copolymers exhibited no weight-loss under 340 C during heating in a nitrogen atmosphere and their glass transition temperature was over the wide temperature range of 66-159 C, depending on the structure of the N-alkyl substituents. The transparent and flexible films were fabricated by a casting method. The optical properties of the films were as follows: the visible light transmittance over 95% at 380 nm, the refractive indices of 1.54-1.58, and the Abbe number of 42-45.

Photoisomerization of bicyclopropylidene and 1,2-dimethylenecyclobutane in rare-gas matrices: Towards the IR-spectroscopic identification of tetramethyleneethane (2,3-dimethylenebutane-1,4-diyl)

Maier, Guenther,Senger, Stefan

, p. 1291 - 1294 (2007/10/03)

Bicyclopropylidene (3) and 1,2-dimethylenecyclobutane (7) have been irradiated in rare-gas matrices. If 1,2-dimethylenecyclobutane (7) is exposed to the light of a KrF excimer laser (λ = 248 nm), an isomeric species is produced, showing an absorption at 793.1 cm-1 (argon matrix) or 791.2 cm- 1 (xenon matrix) in the IR spectrum. The back reaction can be induced with light of k λ = 254 nm. This photochemical interconversion, together with the comparison between the experimental and calculated band positions, supports the assignment of the IR absorption near 790 cm-1 to tetramethyleneethane (5).

Central and Lateral Bicyclo[1.1.0]butane Bond Cleavage with Subsequent Wagner-Meerwein Rearrangements or Carbene Formation in the 185-nm Photolysis of Tricyclo[3.1.0.02,6]hexane, Tricyclo[4.1.0.02,7]heptane, and Tricyclo[5.1.0.02,8]octane

Adam, Waldemar,Alt, Christine,Braun, Max,Denninger, Uwe,Zang, Gerald

, p. 4563 - 4571 (2007/10/02)

The 185-nm photochemistry of tricyclop[3.1.0.02,6]hexane, tricyclo[4.1.0.02,7] heptane, [1,7-d2]tricyclo[4.1.0.02,7]heptane, tricyclo[5.1.0.02,8]octane, and [1-d]tricyclo[5.1.0.02,8]octane was investigated. Tricyclo[5.1.0.02,8]octane yields bicyclo[4.2.0]oct-7-ene, tricyclo[4.1.0.02,7]heptane yields 85% bicyclo[3.2.0]hept-6-ene and 15% 3-methylenecyclohexene, and tricyclo[3.1.0.02,6]hexane yields 39% 3-methylenecyclopentene, 15% 1,3-cyclohexadiene, 26% trans-1,3,5-hexatriene, and 20% cis-1,3,5-hexatriene. From the deuterium-labeling studies, it is concluded that, in the case of the tricyclooctane, the central bicyclobutane bonds cleave in the primary step to give radical cationic or zwitterionic species that undergo a Wagner-Meerwein rearrangement. Also, in the case of tricycloheptane, this is the dominating pathway but lateral C-C bond cleavage with subsequent carbene and product formation takes place to the extent of ca. 15%. For tricyclohexane, this pathway becomes the major route. Our photomechanistic observations are in good agreement with earlier theoretical investigations on the relative energetic ordering of the bicyclobutane HOMOs, in that the product composition reflects this.

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