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Bicyclo[3.2.1]octa-2,6-diene, also known as norbornadiene, is a bicyclic hydrocarbon with the molecular formula C7H10. It features a seven-membered ring with two carbon atoms forming a bridge to a smaller five-membered ring. This unique structure makes it an important compound in organic chemistry, particularly in the study of strained ring systems and as a precursor to various synthetic reactions. Norbornadiene is known for its high reactivity due to the strain in its molecule, which makes it a valuable intermediate in the synthesis of pharmaceuticals, polymers, and other organic compounds.

4096-95-1

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4096-95-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4096-95-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,0,9 and 6 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 4096-95:
(6*4)+(5*0)+(4*9)+(3*6)+(2*9)+(1*5)=101
101 % 10 = 1
So 4096-95-1 is a valid CAS Registry Number.

4096-95-1Relevant academic research and scientific papers

An Experimental Approach to the C8H10 Hypersurface. Kinetic and Thermochemical Investigations on a Formally Forbidden Ground-state <2? + 2?) Cycloaddition

Hassenrueck, Karin,Martin, Hans-Dieter,Mayer, Bernhard,Urbanek, Thomas,Zirwes, Thomas,et al.

, p. 177 - 186 (2007/10/02)

The C8H10 hydrocarbons 1, 3, 4, and 6 have been thermolyzed in a static system and the Arrhenius parameters have been obtained.Calorimetric measurements have been carried out to determine the heats of formation.From these data an experimental energy hypersurface is constructed which shows the following remarkable features: 1) The ground-state energy of endo-1 is higher than that of exo-4 by 8 kcal/mol. 2) The predominant reaction pathway of endo-1 is the formally forbidden 6 and 4->3 are the same, the reaction yielding 6 is faster due to a sizeably higher A factor. 4) The tetracycle 3 chooses the microscopic reverse pathway, i.e. its thermolysis proceeds via exo-4 to give the diene 6.

Chemistry of 2-Carbenabicyclooctadiene

Freeman, Peter K.,Swenson, Karl E.

, p. 2033 - 2039 (2007/10/02)

Pyrolytic decomposition of the lithium or potassium salt of the tosylhydrazone of bicycloocta-3,6-dien-2-one (11) or photolysis of the lithium salt of 11 results in the formation of bicycloocta-2,6-diene (12), tricyclo2,7>oct-3-ene (13), tetracyclo2,8.04,6>octane (14), semibullvalene (15), 5-ethynyl-1,3-cyclohexadiene (16), and endo-6-ethynylbicyclohex-2-ene (17).The formation of the C8H8 fraction (15-17) is ascribed to insertion and rearrangement reactions of singlet 2-carbenabicyclooctadiene, whereas the formation ofthe C8H10 fraction (12-14) appears to be the result of hydrogen abstraction reactions of the corresponding triplet carbene or closely related species.

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