3,4-Dimethylenecyclobut-1-ene

Modify Date: 2025-08-27 23:36:24

3,4-Dimethylenecyclobut-1-ene Structure
3,4-Dimethylenecyclobut-1-ene structure
 Common Name 3,4-Dimethylenecyclobut-1-ene
CAS Number 5291-90-7 Molecular Weight 78.11180
Density 0.84g/cm3 Boiling Point 90.9ºC at 760mmHg
Molecular Formula C6H6 Melting Point N/A
MSDS N/A Flash Point N/A

 Names

Name 3,4-dimethylidenecyclobutene
Synonym More Synonyms

 Chemical & Physical Properties

Density 0.84g/cm3
Boiling Point 90.9ºC at 760mmHg
Molecular Formula C6H6
Molecular Weight 78.11180
Exact Mass 78.04700
LogP 1.66860
Index of Refraction 1.493

 Safety Information

HS Code 2902199090

 Synthetic Route

1,5-hexadiyne structure

1,5-hexadiyne

CAS#:628-16-0

~%

3,4-Dimethylenecyclobut-1-ene Structure

3,4-Dimethylene...

CAS#:5291-90-7

Literature: Huntsman,W.D.; Wristers,H.J. Journal of the American Chemical Society, 1967 , vol. 89, # 2 p. 342 - 347
1,5-hexadiyne structure

1,5-hexadiyne

CAS#:628-16-0

~99%

3,4-Dimethylenecyclobut-1-ene Structure

3,4-Dimethylene...

CAS#:5291-90-7

fulvene structure

fulvene

CAS#:497-20-1

Literature: Zimmermann, Gerhard; Nuechter, Matthias; Remmler, Matthias; Findeisen, Matthias; Hopf, Henning; et al. Chemische Berichte, 1994 , vol. 127, # 9 p. 1747 - 1754
Allene structure

Allene

CAS#:463-49-0

~%

hexa-1,2-dien-5-yne structure

hexa-1,2-dien-5-yne

CAS#:33142-15-3

3,4-Dimethylenecyclobut-1-ene Structure

3,4-Dimethylene...

CAS#:5291-90-7

1,5-hexadiyne structure

1,5-hexadiyne

CAS#:628-16-0

Detail
Literature: Howe, Pui-Teng; Fahr, Askar Journal of Physical Chemistry A, 2003 , vol. 107, # 45 p. 9603 - 9610
3-Chloropropyne structure

3-Chloropropyne

CAS#:624-65-7

~%

hexa-1,2-dien-5-yne structure

hexa-1,2-dien-5-yne

CAS#:33142-15-3

3,4-Dimethylenecyclobut-1-ene Structure

3,4-Dimethylene...

CAS#:5291-90-7

1,5-hexadiyne structure

1,5-hexadiyne

CAS#:628-16-0

Detail
Literature: Howe, Pui-Teng; Fahr, Askar Journal of Physical Chemistry A, 2003 , vol. 107, # 45 p. 9603 - 9610
3-Bromopropyne structure

3-Bromopropyne

CAS#:106-96-7

~%

hexa-1,2-dien-5-yne structure

hexa-1,2-dien-5-yne

CAS#:33142-15-3

3,4-Dimethylenecyclobut-1-ene Structure

3,4-Dimethylene...

CAS#:5291-90-7

1,5-hexadiyne structure

1,5-hexadiyne

CAS#:628-16-0

Detail
Literature: Howe, Pui-Teng; Fahr, Askar Journal of Physical Chemistry A, 2003 , vol. 107, # 45 p. 9603 - 9610
tricarbonyl-η6-(3,4-dimethylenecyclobutene)chromium(0) structure

tricarbonyl-η6-...

CAS#:133777-09-0

Trimethylphosphine structure

Trimethylphosphine

CAS#:594-09-2

~%

fac-(PMe3)3Cr(CO)3 structure

fac-(PMe3)3Cr(CO)3

CAS#:24554-62-9

3,4-Dimethylenecyclobut-1-ene Structure

3,4-Dimethylene...

CAS#:5291-90-7

Literature: Rau, Doris; Behrens, Ulrich Angewandte Chemie, 1991 , vol. 103, p. 847 - 848
1,5-hexadiyne structure

1,5-hexadiyne

CAS#:628-16-0

~5%

1,3-Hexadien-5-yne. structure

1,3-Hexadien-5-yne.

CAS#:10420-90-3

3,4-Dimethylenecyclobut-1-ene Structure

3,4-Dimethylene...

CAS#:5291-90-7

fulvene structure

fulvene

CAS#:497-20-1

Detail
Literature: Zimmermann, Gerhard; Nuechter, Matthias; Remmler, Matthias; Findeisen, Matthias; Hopf, Henning; et al. Chemische Berichte, 1994 , vol. 127, # 9 p. 1747 - 1754
1,5-hexadiyne structure

1,5-hexadiyne

CAS#:628-16-0

~%

cis-1,3-hexadien-5-yne structure

cis-1,3-hexadie...

CAS#:5222-76-4

3,4-Dimethylenecyclobut-1-ene Structure

3,4-Dimethylene...

CAS#:5291-90-7

fulvene structure

fulvene

CAS#:497-20-1

Detail
Literature: Tranter, Robert S.; Tang, Weiyong; Anderson, Ken B.; Brezinsky, Kenneth Journal of Physical Chemistry A, 2004 , vol. 108, # 16 p. 3406 - 3415

 Customs

HS Code 2902199090
Summary 2902199090 other cyclanes, cyclenes and cyclotherpenes。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%

 Synonyms

3,4-Dimethylenecyclobut-1-ene
3,4-Dimethylenecyclobutene
3,4-Bis-methylen-1-cyclobuten
Cyclobutene,3,4-bis(methylene)
Cyclobutene,bis(methylene)-(9CI)
Cyclobutene,3,4-dimethylene-(6CI,7CI,8CI)
3,4-bis(methylene)-cyclobutene
Dimethylenecyclobutene
3,4-Bis(methylen)cyclobuten
3,4-Dimethylen-cyclobuten-1
3,4-Dimethylencyclobuten
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