Add time:09/03/2019 Source:sciencedirect.com
How long a CC bond can be? A question has long fascinated chemists. This work reports an example of extraordinary long CC bond distance of 1.990(4) Å observed in single-crystal X-ray structure of 1,2-(NHMes)2-o-carborane (2; Mes = 2,4,6-trimethylphenyl). DFT calculations show that hyperconjugation of lone pairs of the nitrogen atoms into the empty σ* orbital of the cage CC bond is the origin of the bond elongation. Such hyperconjugation can be suppressed if the two nitrogen atoms in 2 are linked to a Lewis acidic germanium (II) center.
We also recommend Trading Suppliers and Manufacturers of (-)-Bakkenolide C (cas 18456-00-3). Pls Click Website Link as below: cas 18456-00-3 suppliers
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View