Molecular structures of new compounds with Ge=C and Sn=C double bonds [1]

✍ Scribed by Martin Stürmann; Wolfgang Saak; Manfred Weidenbruch; Armin Berndt; David Sclesclkewitz

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 194 KB
• Volume: 10
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/(sici)1098-1071(1999)10:7<554::aid-hc7>3.0.co;2-x

✦ Synopsis

Addition reactions of the diarylgermylene R 2 Ge: 5, C 6 H) and the heteroleptic stannylene RRЈSn: (RЈ ‫ס‬ Si(SiMe 3 ) 3 ) to the cryptodiborylcarbene (Me 3 Si) 2 C(tBuB) 2 C: furnish the germaethene (Me 3 Si) 2 C(tBuB) 2 C‫ס‬GeR 2 (8) and the stannaethene (Me 3 Si) 2 C(tBuB) 2 C‫ס‬SnRRЈ (12), respectively. The X-ray structure analysis of 8 reveals a twisting of the Ge‫ס‬C double bond with torsion angles of 33 and 34Њ. In addition to a slight twisting of the double bond (average torsion angle ‫ס‬ 11.9Њ), compound 12 shows a trans-bending of the substituents with bent angles of 13.2Њ at the tin and 9.7Њ at the carbon atom of the Sn‫ס‬C double bond.