158266-23-0

Basic information

• Product Name: 3,3,4,4,7,7,8,8-octamethyl-3,4-disila-7,8-digermacycloocta-1,5-diyne
• Synonyms: 3,3,4,4,7,7,8,8-octamethyl-3,4-disila-7,8-digermacycloocta-1,5-diyne
• CAS NO: 158266-23-0
• Molecular Weight: 369.674
• Mol File: 158266-23-0.mol

Chemical Properties

• CAS DataBase Reference: 3,3,4,4,7,7,8,8-octamethyl-3,4-disila-7,8-digermacycloocta-1,5-diyne(CAS DataBase Reference)
• NIST Chemistry Reference: 3,3,4,4,7,7,8,8-octamethyl-3,4-disila-7,8-digermacycloocta-1,5-diyne(158266-23-0)
• EPA Substance Registry System: 3,3,4,4,7,7,8,8-octamethyl-3,4-disila-7,8-digermacycloocta-1,5-diyne(158266-23-0)

Safety Data

• Hazardous Substances Data: 158266-23-0(Hazardous Substances Data)

Upstream product

• 158266-30-9 1,2-diethynyl-1,1,2,2-tetramethyldigermane 
• 22702-77-8 1,2-dichlorotetramethyldigermane 
• 54773-31-8 1,2-diethylnyl-1,1,2,2-tetramethyldisilane 

Relevant articles and documents

Electronic properties, polymerization, and cycloaddition of 3,4,7,8-tetragermacycloocta-1,5-diyne and related compounds

Permethylated 3,4,7,8-tetragermacycloocta-1,5-diyne (1) and 3,4-disila-7,8-digermacycloocta-1,5-diyne (2) were prcpared.The photoelectron spectra of 1 and 2 were compared with that of their tetrasila analogue 3.The first ionization energy decreases in the order 3 > 2 > 1.Charge-transfer spectra of 1-tetracyanoethylene (TCNE), 2-TCNE and 3-TCNE complexes were observed.In CH2Cl2 containing TCNE 1 underwent oligomerization to give its higher homologues, and in CH3CN containing a catalytic amount of TCNE both 1 and 2 were polymerized to give the corresponding polymers almost quantitatively, whereas the sila analogue 3 was stable under these conditions.All compounds 1, 2 and 3 cycloadded to 2,3-dichloro-5,6-dicyano-1,4-benzoquinone to give the corresponding 1:1 adducts in a manner.Keywords: Germanium; Charge transfer; Group 14; Photoelectron spectroscopy; Main Group metals; Silicon

Preparation and Properties of 3,4,7,8-Tetragermacycloocta-1,5-diyne and Related Compounds

Permethylated 3,4,7,8-tetragermacycloocta-1,5-diyne (1) and 3,4-disila-7,8-digermacycloocta-1,5-diyne (2) were prepared.The photoelectron spectra of 1 and 2 were compared with that of their tetrasila-analog 3.The first ionization potential decreases in the order of 3, 2, and 1.Charge-transfer spectra of 1-tetracycanoethylene (TCNE), 2-TCNE and 3-TCNE complexes were observed.Only 1 was oligomerized in the presence of TCNE to give its higher homologues.All 1, 2, and 3 cycloadded to 2,3-dichloro-5,6-dicyano-1,4-benzoquinone to give the corresponding 1:1 adducts in a manner.