76054-64-3

Basic information

• Product Name: 7,7-dimethyl-1,4,5,6-tetraphenyl-2,3-benzo-7-germanorbornadiene
• Synonyms: 7,7-dimethyl-1,4,5,6-tetraphenyl-2,3-benzo-7-germanorbornadiene
• CAS NO: 76054-64-3
• Molecular Weight: 535.224
• Mol File: 76054-64-3.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 7,7-dimethyl-1,4,5,6-tetraphenyl-2,3-benzo-7-germanorbornadiene(CAS DataBase Reference)
• NIST Chemistry Reference: 7,7-dimethyl-1,4,5,6-tetraphenyl-2,3-benzo-7-germanorbornadiene(76054-64-3)
• EPA Substance Registry System: 7,7-dimethyl-1,4,5,6-tetraphenyl-2,3-benzo-7-germanorbornadiene(76054-64-3)

Safety Data

• Hazardous Substances Data: 76054-64-3(Hazardous Substances Data)

Upstream product

• 20991-88-2 1,1-dimethyl-2,3,4,5-tetraphenyl-1-germacyclopentadiene 
• 1072-85-1 o-fluorobromobenzene 

Downstream Products

• 751-38-2 1,2,3,4-tetraphenylnaphthalene 
• 14630-40-1 Bis(trimethylsilyl)ethyne 
• 121393-68-8 (CH₂C(C₆H₅)Ge(CH₃)2)2O 
• 14629-97-1 (E)-PhCHCHGeMe₃ 
• 31790-89-3 (Z)-PhCHCHGeMe₃ 
• 16090-54-3 hexamethylcyclotrigermatrithiane 
• 96140-31-7 Br(Ge(CH₃)2)2Br 
• 90030-12-9 benzoylbromodimethylgermane 
• 1730-66-1 methylgermanium bromide 
• 103-29-7 1,1'-(1,2-ethanediyl)bisbenzene 
• 108-88-3 toluene 
• 120033-93-4 alkylidene-1,2,3-thiadigermetane 
• 126086-83-7 C₆H₅C₂Ge(CH₃)2Br 
• 80242-31-5 (Z,E)-GeMe₂(ChCCPhMe)2 

Relevant articles and documents

Chemistry of Heavy Carbene Analogues R2M (M = Si, Ge, Sn). 8. Germylenes: Singlets or Triplets? Cheletropic Cycloadditions of Me2Ge and GeI2 to Conjugated Dienes

Thermally generated germylenes Me2Ge undergo in solution under mild conditions (70-150 deg C) concerted 1,4-additions of the linear cheletropic type to certain 1,3-dienes.Thus, the highly reactive meso diallene 10a gives, in a about 1:1 ratio, only the two isomeric 1-germacyclopentenes 11a and 11b expected from front- and back-side attack of Me2Ge, whereas the D,L-diallene 10b produces only the third isomer, 11c, in accordance with this mechanism.The yields are about 70percent; the isomer purity is >/= 98percent.Likewise, two other E,E-1,4-disubstituted 1,3-butadienes give only the corresponding cis-2,5-disubstituted 1-germacyclopentenes 7a or 9a in 80percent or 30percent yields with an isomer purity of >/= 98percent (limit of the NMR analysis).Similarly, with GeI2 and 10a, only 14a and 14b are found, and 14c with 10b, as expected for a cheletropic reaction.Methylation of 14a-c yields the corresponding compounds 11a-c.Other mechanisms for these 1,4-additions are discussed but are highly unlikely: thermal germylenes Me2Ge and Ge2I behave as singlets.