109828-73-1

Basic information

• Product Name: 9,9-Bis-(2,4,6-trimethyl-phenyl)-8b,9-dihydro-4bH-9-sila-benzo[3,4]cyclobuta[1,2-a]indene
• Synonyms: 9,9-Bis-(2,4,6-trimethyl-phenyl)-8b,9-dihydro-4bH-9-sila-benzo[3,4]cyclobuta[1,2-a]indene
• CAS NO: 109828-73-1
• Molecular Weight: 444.692
• Mol File: 109828-73-1.mol

Chemical Properties

• CAS DataBase Reference: 9,9-Bis-(2,4,6-trimethyl-phenyl)-8b,9-dihydro-4bH-9-sila-benzo[3,4]cyclobuta[1,2-a]indene(CAS DataBase Reference)
• NIST Chemistry Reference: 9,9-Bis-(2,4,6-trimethyl-phenyl)-8b,9-dihydro-4bH-9-sila-benzo[3,4]cyclobuta[1,2-a]indene(109828-73-1)
• EPA Substance Registry System: 9,9-Bis-(2,4,6-trimethyl-phenyl)-8b,9-dihydro-4bH-9-sila-benzo[3,4]cyclobuta[1,2-a]indene(109828-73-1)

Safety Data

• Hazardous Substances Data: 109828-73-1(Hazardous Substances Data)

Upstream product

• 109828-65-1 C₃₂H₃₂Si 
• 513-81-5 2,3-dimethyl-buta-1,3-diene 
• 13447-87-5 lithium anthracenide 
• 670-54-2 ethenetetracarbonitrile 

Relevant articles and documents

Charge-transfer complex formation and photo-induced electron-transfer reaction of dibenzo-7-silabicyclo[2.2.1]hepta-2,5-dienes

Dibenzo-7-silabicyclo[2.2.1]hepta-2,5-dienes (1a, 1b) are excellent electron donors because of effective σ-π conjugation between the orbitals of C-C π bonds and Si-C σ bonds. Some of their donor properties are demonstrated by the reactions with some electron accepters. When 1a and 1b are mixed with tetracyanoethylene, facile formation of charge-transfer complexes was observed. In the 2,4,6-triphenylpyrylium tetrafluoroborate-sensitized photoreaction of 1b, the corresponding difluorosilane and anthracene were obtained in good yields. The structural and electronic features of radical cation 1a+. were provided by semiempericaI molecular orbital calculation. In addition, the structure of 1a in crystals was determined by X-ray crystallography and compared with that obtained by the calculation.

Rearrangement of silanorbornadienes via photoinduced electron-transfer

Irradiation of silanorbornadienes 1 using 9,10-dicyanoanthracene as a sensitizer afforded two isomers 2 and 3 accompanied with anthracene. In the presence of molecular oxygen, dioxide 5 was obtained as an additional product. These reactions are explained in terms of the initial electron donor-acceptor interaction followed by skeletal rearrangement.

Preparation and Some Reactions of Dibenzo-7-silanorbornadiene Derivatives

On irradiation, dibenzo-7-silanorbornadienes with bulky substituents on silicon generated the corresponding crowded silylenes that dimerized to kinetically stable disilenes in the absence of trapping agents.Dibenzo-7-silanorbornadienes also underwent a ne