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1,12-Diphenyl-dodeca-1,3,9,11-tetrayne is a conjugated polyyne compound characterized by its alternating single and triple carbon-carbon bonds, with two phenyl groups attached to the first and last carbon atoms. This molecule is known for its rigid structure and unique electronic properties, which arise from the extended π-conjugation along the carbon backbone. It is often used in the synthesis of more complex organic molecules and materials, such as conducting polymers and molecular wires, due to its ability to facilitate charge transport. The compound's stability and reactivity can be influenced by the presence of the phenyl groups, which can also affect its potential applications in areas such as organic electronics and materials science.

5509-14-8

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5509-14-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 5509-14-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,5,0 and 9 respectively; the second part has 2 digits, 1 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 5509-14:
(6*5)+(5*5)+(4*0)+(3*9)+(2*1)+(1*4)=88
88 % 10 = 8
So 5509-14-8 is a valid CAS Registry Number.

5509-14-8SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017

1.Identification

1.1 GHS Product identifier

Product name 1,12-Diphenyl-dodeca-1,3,9,11-tetain

1.2 Other means of identification

Product number -
Other names -

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

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More Details:5509-14-8 SDS

5509-14-8Relevant academic research and scientific papers

Benzocyclobutadienes: An Unusual Mode of Access Reveals Unusual Modes of Reactivity

Xiao, Xiao,Woods, Brian P.,Xiu, Wen,Hoye, Thomas R.

, p. 9901 - 9905 (2018)

The reaction of an aryne with an alkyne to generate a benzocyclobutadiene (BCB) intermediate is rare. We report here examples of this reaction, revealed by Diels–Alder trapping of the BCB by either pendant or external electron-deficient alkynes. Mechanistic delineation of the reaction course is supported by DFT calculations. A three-component process joining the benzyne first with an electron-rich and then with an electron-poor alkyne was uncovered. Reactions in which the BCB functions in a rarely observed role as a 4π diene component in Diels–Alder reactions are reported. The results also shed new light on aspects of the hexadehydro-Diels–Alder reaction used to generate the benzynes.

Gold-Catalyzed Cadiot–Chodkiewicz-type Cross-Coupling of Terminal Alkynes with Alkynyl Hypervalent Iodine Reagents: Highly Selective Synthesis of Unsymmetrical 1,3-Diynes

Li, Xiangdong,Xie, Xin,Sun, Ning,Liu, Yuanhong

supporting information, p. 6994 - 6998 (2017/06/08)

A new and efficient method for the synthesis of unsymmetrical 1,3-butadiynes by gold-catalyzed C(sp)–C(sp) cross-coupling of terminal alkynes with alkynyl hypervalent iodine(III) reagents has been developed. The reaction features high selectivity and efficiency, mild reaction conditions, wide substrate scope, and functional-group compatibility, and is a highly attractive complement to existing methods. Mechanistic studies reveal that formation of a phenanthrolinyl-ligated gold(I) complex is crucial for the efficiency and selectivity of the target transformation.

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