40276-88-8

Basic information

• Product Name: 1-Oxa-2,7-disilacyclohepta-3,5-diene, 2,2,7,7-tetramethyl-3,4,5,6-tetraphenyl-
• CAS NO: 40276-88-8
• Molecular Formula: C32H32OSi2
• Molecular Weight: 488.776
• Mol File: 40276-88-8.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: 1-Oxa-2,7-disilacyclohepta-3,5-diene, 2,2,7,7-tetramethyl-3,4,5,6-tetraphenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: 1-Oxa-2,7-disilacyclohepta-3,5-diene, 2,2,7,7-tetramethyl-3,4,5,6-tetraphenyl-(40276-88-8)
• EPA Substance Registry System: 1-Oxa-2,7-disilacyclohepta-3,5-diene, 2,2,7,7-tetramethyl-3,4,5,6-tetraphenyl-(40276-88-8)

Safety Data

• Hazardous Substances Data: 40276-88-8(Hazardous Substances Data)

Upstream product

• 501-65-5 diphenyl acetylene 
• 670-54-2 ethenetetracarbonitrile 
• 40722-35-8 1,1,2,2-tetramethyl-1,2-disila-3,4,5,6-tetraphenylcyclohexa-3,5-diene 

Relevant articles and documents

Cyclization of 1,2-disilacyclohexa-3,5-dienes initiated by electron transfer reactions with TCNE

Thermal reaction of 1,2-disilacyclohexa-3,5-dienes with tetracyanoethylene (TCNE) gave 8-amino-6,6,11,11-tetramethyl-2,3,4,5-tetraphenyl-7-aza-6,11-disilatricyclo[5,3, 0,12,5]undeca-3,8,10(1)-triene-9,10-dicarbonitrile through a charge-transfer complex.

Electron-transfer reactions of 1,2-dimetallacyclohexa-3,5-dienes with TCNE

Thermal reactions of 1,2-dimetallacyclohexa-3,5-dienes (1-3) with tetracyanoethylene (TCNE) were investigated. The reaction of 1,2-disilacyclohexa-3,5-diene (1) with TCNE mainly gave 4-amino-5,6-dicyano-2,2,11,11-tetramethyl-1,8,9,10-tetraphenyl-3-aza-2, 11-disilatricyclo[6.2.1.03,7]undeca-4,6,9-triene through a charge-transfer complex. The reaction of 1,2-digermacyclohexa-3,5-diene (2) with TCNE afforded 4-amino-5,6-dicyano-2,2,11,11-tetramethyl-1,8,9, 10-tetraphenyl-3-aza-2,11-digermatricyclo[6.2.1.03,7] undeca-4,6,9-triene. 2,2,3,3-Tetracyano-7,7-dimethyl-1,4,5,6- tetraphenyl-7-germabicyclo[2.2.1]hept-5-ene was also detected. On the other hand, 1-germa-2-silacyclohexa-3,5-diene (3) reacted with TCNE to give 4-amino-5,6-dicyano-2,2,11,11-tetramethyl-1,8,9,10- tetraphenyl-3- aza-11-germa-2-silatricyclo[6.2.1.03,7] undeca-4,6,9-triene, 4-amino-5,6-dicyano-2,2,11,11-tetramethyl-1,8,9,10- tetraphenyl-3-aza-11- germa-2-silatricyclo[6.3.01,8 .03,7]undeca-4,6,9- triene, and 2,2,3,3-tetracyano-7,7-dimethyl-1,4,5, 6-tetraphenyl-7- germabicyclo[2.2.1]hept-5-ene as main products. The mechanism of the formation of new heterocyclic compounds through electron-transfer reactions of 1,2-dimetallacyclohexa-3,5-dienes with TCNE is discussed.