2004/09/16 by Akira Sekiguchi, Rei Kinjo, Masaaki Ichinohe · 1 citation
Chemistry · #Synthesis and characterization of novel inorganic/organometallic compounds #Organoboron and organosilicon chemistry #Organometallic Complex Synthesis and Catalysis #Triple bond #Trimethylsilyl #Silicon #Chemistry #Tetrahydrofuran #Bond length #Angstrom #Medicinal chemistry #Double bond #Crystallography #Crystal structure #Polymer chemistry #Organic chemistry
paper · doi:10.1126/science.1102209
openalex publication_date 2004/09/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/23
The reaction of 2,2,3,3-tetrabromo-1,1,4,4-tetrakis[bis(trimethylsilyl)methyl]-1,4-diisopropyltetrasilane with four equivalents of potassium graphite (KC8) in tetrahydrofuran produces 1,1,4,4-tetrakis[bis(trimethylsilyl)methyl]-1,4-diisopropyl-2-tetrasilyne, a stable compound with a silicon-silicon triple bond, which can be isolated as emerald green crystals stable up to 100 degrees C in the absence of air. The SiSi triple-bond length (and its estimated standard deviation) is 2.0622(9) angstroms, which shows half the magnitude of the bond shortening of alkynes compared with that of alkenes. Unlike alkynes, the substituents at the SiSi group are not arranged in a linear fashion, but are trans-bent with a bond angle of 137.44(4) degrees.