666754-21-8

Basic information

• Product Name: 1,1'-Biphenyl, 2-(1,2,3-trimethyl-4-methylene-2-cyclobuten-1-yl)-
• CAS NO: 666754-21-8
• Molecular Formula: C20H20
• Molecular Weight: 260.379
• Mol File: 666754-21-8.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1,1'-Biphenyl, 2-(1,2,3-trimethyl-4-methylene-2-cyclobuten-1-yl)-(CAS DataBase Reference)
• NIST Chemistry Reference: 1,1'-Biphenyl, 2-(1,2,3-trimethyl-4-methylene-2-cyclobuten-1-yl)-(666754-21-8)
• EPA Substance Registry System: 1,1'-Biphenyl, 2-(1,2,3-trimethyl-4-methylene-2-cyclobuten-1-yl)-(666754-21-8)

Safety Data

• Hazardous Substances Data: 666754-21-8(Hazardous Substances Data)

Upstream product

• 2052-07-5 2-Bromobiphenyl 
• 90002-77-0 1-chloro-1,3,4-trimethyl-2-methylene-3-cyclobutene 

Relevant articles and documents

Carbocationic cyclizations: IX. Rearrangement of long-lived 4-(2-biphenylyl)-1,2,3,4-tetramethylcyclobutenyl cation into trans- and cis-4,5,6,6-tetramethyl-4,5,6-trihydrocyclopenta[j,k]phenanthren-5-yl cations

According to the 1H and 13C NMR data, long-lived 4-(2-biphenylyl)-1,2,3,4-tetramethylcyclobutenyl cation generated by protonation of 3-(2-biphenylyl)-1,2,3-trimethyl-4-methylenecyclobutene in super-acids undergoes cyclization which l